Suppose you’re a 3D artist pushing photorealistic renders, motion graphics, or large-scale animation in Blender. In that case, the right GPU renderer can make all the difference, especially when you’re working with multiple GPUs. In 2025, multi-GPU rendering is faster, more accessible, and more competitive than ever.

Let’s explore the best multi-GPU render engines for Blender in 2025: Redshift, Octane, Arnold GPU, and V-Ray GPU—comparing their strengths, compatibility, and performance across multi-GPU setups, in this blog post with iRender.

GPU Support: ✅ Multi-GPU
GPU Vendor: NVIDIA only (CUDA/OptiX)
License: Paid (Maxon One or Redshift Subscription)

Redshift has matured into a serious contender for Blender users thanks to continued development and native Blender integration since late 2023. It’s one of the few biased GPU renderers, meaning it uses intelligent shortcuts to get stunning results fast, perfect for animation-heavy workflows or tight deadlines.

Redshift supports multi-GPU rendering on NVIDIA GPUs and can be configured to use all compatible GPUs on your machine. For optimal performance, Redshift recommends GPUs with high VRAM and CUDA cores.

Why It’s Great on Multi-GPU:

• Efficient scaling across multiple NVIDIA GPUs.
  
• Excellent memory handling, ideal for large scenes.
  
• Fast bucket rendering, especially in multi-pass workflows.
  

Downside: Still no native AMD support, and its Blender integration, while improving, trails behind Cinema 4D or Houdini in features.

Best for: Motion designers, character animators, and Blender users already in the Maxon ecosystem.

GPU Support: ✅ Multi-GPU
GPU Vendor: NVIDIA only (CUDA)

Octane has long been the go-to for artists craving uncompromised realism. It’s an unbiased GPU renderer, delivering stunning results out of the box with physically accurate lighting and materials.

OctaneRender scales almost perfectly with multiple GPUs, effectively doubling render speed with each additional GPU, provided the scene fits within the VRAM of each card.

Why It’s Great on Multi-GPU:

• Linear scaling with up to 4–8 GPUs.
  
• Real-time preview updates across all GPUs.
  
• Extremely fast path tracing, especially with denoising enabled.
  

Downside: High VRAM usage and stability issues in complex Blender scenes. Also, still no AMD support.

Best for: Product visualizers, architectural artists, and anyone needing ultra-high-quality stills and cinematic rendering.

GPU Support: ✅ Multi-GPU
GPU Vendor: NVIDIA only (OptiX)
License: Paid (Autodesk Subscription)

Arnold’s native Blender support is still in the gray zone, but thanks to USD export and third-party bridges, Blender artists can now tap into Arnold GPU, which became impressively stable in 2024. Unlike its CPU counterpart, Arnold GPU supports multiple GPUs via NVIDIA OptiX.

Arnold GPU utilizes all available NVIDIA GPUs at full capacity and can pool memory if NVLink is available. Arnold GPU works on NVIDIA GPUs of the Ada, Ampere, Turing, Volta, Pascal, and Maxwell architectures. Multiple GPUs will improve performance. 

Why It’s Great on Multi-GPU:

• Physically accurate rendering with robust AOV workflows.
  
• Fantastic subsurface scattering and hair rendering.
  
• Consistent results across GPU/CPU—great for hybrid pipelines.
  

Downside: Not a native Blender experience. Exporting via USD adds friction to the workflow.

Best for: Studios or freelancers who work across Maya/Blender and need unified rendering pipelines.

GPU Support: ✅ Multi-GPU
GPU Vendor: NVIDIA only (CUDA/RTX)
License: Paid (Chaos License)

V-Ray supports multi-GPU setups, allowing multiple NVIDIA GPUs to work together. V-Ray GPU has come a long way in performance and Blender support. While Chaos’ official Blender plugin is still unofficial (as of early 2025), many artists are using V-Ray GPU successfully via V-Ray Standalone and .vrscene exports from Blender.

Why It’s Great on Multi-GPU:

• Mature production-grade renderer with strong scaling.
  
• Fast interactive previews.
  
• Industry-trusted for archviz and VFX.
  

Downside: Export pipeline adds friction, and Blender support lacks the polish of Max or Maya.

Best for: Archviz professionals and artists transitioning from other DCCs who want Blender in their pipeline.

If you’re serious about multi-GPU rendering in Blender, it’s no longer just about choosing the best render engine. It’s about pairing that engine with the right infrastructure. No matter how powerful your render engine is—Redshift, Octane, Arnold GPU, or V-Ray GPU—your performance still heavily depends on hardware. For freelancers and small studios, building a multi-GPU workstation with RTX 4090s or RTX 6000 Ada cards can be cost-prohibitive. This is where cloud render farms like iRender offer the power and flexibility of a high-end workstation without the investment.

iRender is proud to be one of the best GPU service providers on the market. We provide you with high-configuration models with advanced specifications such as AMD Ryzen™ Threadripper™ PRO 3955WX @ 3.9 – 4.2GHz or AMD Ryzen™ Threadripper™ PRO 5975WX @ 3.6 – 4, 5GHz, 256GB RAM, 2TB NVMe SSD storage. Most importantly, we always update to the latest GPU technology, with 1/2/4/6/8 x RTX3090/RTX4090.

Under the IaaS (Infrastructure as a Service) model you will have full control over the machine via a remote desktop app, similar to TeamViewer but more stable. You will be able to proactively install the software and use it on the server just like using a personal computer. You can find many server packages with high-end configurations that are extremely suitable for complex projects.

We’re always happy to help you with any questions. If you have any problems or questions, don’t hesitate to contact our 24/7 support team. Or via Whatsapp: 0912 785 500 for free advice and support.

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Source and image:maxon.net, reddit.com, otoy.com

Cinema 4D is a professional-grade application used for 3D animation, modeling, simulation, and rendering. While it comes with its native rendering engine, Redshift, Cinema 4D also supports a wide range of third-party render plug-ins. In this article, we’ll explore whether Vray GPU or Arnold GPU for Cinema 4D is the better option.

VRay, developed by Chaos, is a well-established rendering engine known for its high-quality, photorealistic output and real-time capabilities. Although it’s not built into Cinema 4D, it integrates smoothly and functions reliably within the environment. Let’s take a closer look at the advantages and limitations of Vray GPU for Cinema 4D.

Easy to use

VRay features a user-friendly interface and intuitive tools that cater well to artists, helping improve workflow and allowing users to complete tasks more quickly and effectively.

High-quality and fast rendering

VRay for Cinema 4D offers impressive rendering power. In addition to CPU rendering, it supports GPU rendering for faster performance. Moreover, its new hybrid rendering mode can utilize both CPU and GPU simultaneously, delivering realistic results in a shorter time. See details about Vray hybrid rendering here.

Scalable rendering

Beyond local rendering, V-Ray supports cloud-based rendering via services like Chaos Cloud or external render farms. This scalability allows users to distribute rendering tasks across multiple systems and generate high-resolution results more quickly

Comprehensive tools

With numerous features such as a broad range of lighting, rendering tools, and its ability to handle even the most complex scenes, Vray can streamline workflows and produce visually stunning outputs.

Flexibility

Vray GPU for Cinema 4D offers great flexibility, allowing users to fine-tune settings such as lighting, materials, and textures. It also supports easy switching between CPU, GPU, and hybrid modes to suit different project needs and hardware setups.

Limitation

Depending on the rendering method and hardware, Vray GPU for Cinema 4D may lack support for certain features available in its CPU counterpart, such as Coat Filter and Multi Matte. More information on these limitations is available at this link.

Arnold is a high-end Monte Carlo ray tracing renderer known for delivering realistic 3D character renders and lifelike visualizations. Widely used across the industry, it’s also a powerful third-party rendering option for Cinema 4D. Let’s take a look at what makes Arnold GPU for Cinema 4D stand out, along with its limitations.

Easy to use

Arnold is designed with usability in mind. Its features are user-friendly and well-organised, its rendering settings are simple to learn—making it easy for both beginners and professionals to get started quickly.

Realistic rendering

Arnold’s unbiased rendering engine accurately simulates light behavior, resulting in highly photorealistic images. It’s especially effective at handling subtle lighting effects and complex materials..

Feature-rich

Arnold offers deeper native integration with Cinema 4D than most other third-party engines. It supports many Cinema 4D features, such as Noises and the Floor Object. It also fully supports professional standards like OCIO, ACES, and OSL. The Interactive Preview Render (IPR) is responsive, whether using CPU or GPU mode.

Flexibility

Arnold supports both CPU and GPU rendering, offering flexibility that some engines lack. Unlike Corona (CPU only) or Redshift and Octane (GPU only), Arnold allows seamless switching between CPU and GPU modes—while delivering identical results across both.

Limitation 

Despite its strengths, Arnold GPU does have some limitations in Cinema 4D. It does not support volume rendering from Turbulence FD or X-Particles. Additionally, some older C4DtoA shaders (from versions before 2.5.0), such as normal_displacement, vector_displacement may not be compatible when imported from previous projects via ASS files.

Before we dive into the similarities and differences between the two, let’s first go over the summary table below for a quick comparison.

In terms of pricing, both Vray and Arnold are available only through subscription-based licenses, with no option for perpetual purchase. While Vray’s monthly cost is about twice that of Arnold, it’s important to consider additional factors to determine if the higher price is justified.

Vray offers three rendering modes—GPU, CPU, and hybrid—giving users more flexibility depending on their workflow. In contrast, Arnold supports two options: CPU and GPU rendering.

In terms of rendering algorithm, Vray supports both biased and unbiased rendering, allowing users to prioritize either speed or realism. Arnold, on the other hand, is strictly an unbiased renderer, designed to produce physically accurate images that mimic real-world lighting.

Both engines rely on NVIDIA’s GPU architecture. However, Vray GPU supports both CUDA and OptiX, while Arnold GPU uses OptiX only.

In terms of hardware scalability, both Vray and Arnold can leverage multiple GPUs to accelerate rendering. While Vray technically supports unlimited GPUs, it is officially optimized for up to 4. Arnold is stated to support a maximum of 8 GPUs.

As for platform compatibility, both renderers can run on Windows and Linux. Although Vray can be used on macOS, Chaos has clarified that it does not offer official support for it.

Lastly, both Vray and Arnold provide a 30-day free trial, giving users a chance to test them out before making a decision.

Ready to see how they perform in practice? Let’s scroll down to check out the render tests iRender ran using Vray GPU or Arnold GPU for Cinema 4D.

iRender provide high-configuration machines with upmarket specifications like AMD Ryzen™ Threadripper™ PRO 3955WX @ 3.9 – 4.2GHz or AMD Ryzen™ Threadripper™ PRO 5975WX @ 3.6 – 4.5GHz, 1/2/4/6/8 x RTX4090 or RTX3090,  RAM 256GB, Storage NVMe SSD 2TB.

Why can iRender be a great render farm for you?

In addition to high-configuration servers, iRender provides many other utilities to provide the best user experience.

• Dedicated server for individuals: You have full control and access to the server you rent. The working environment (installed apps, files) will be stored for the next use.
• Easy and free file transfer between your computer and iRender’s server: The transferring task can be done via iRender GPU application for Windows and the iRender Drive application for MacOS.
• 24/7 assistance: iRender’s attentive agents are always ready to support all your queries.
• All software compatibility: iRender’s PCs are built to meet the configuration needs of all 3D software and rendering tools at a variety of cost levels for users to choose from.

Let’s see how fast Vray GPU or Arnold GPU for Cinema 4D renders on our nodes!

New users will get a 100% bonus for the first transaction within 24 hours of their registration. No minimum amount!! If you top up 50$, you will get 100 points in total to hire our machines.

REGISTER NOW

If you have any questions, please get in touch with me through email duongdt@irender.vn or our 24/7 support team for a quick response.

Thank you for reading

Source: Autodesk, Chaos, Maxon

A realistic 3D human model plays a vital role in various fields, including video games, animation, medical simulations, marketing, and especially virtual reality experiments. Since eyes are often considered the “windows to the soul,” crafting lifelike eyes is a crucial aspect of creating a believable 3D human model. In this guide, iRender will explore five fundamental steps to model 3D eyes.

To model 3D eyes as realistic as possible, the first and most important step is to familiarize yourself with the anatomy of the eye. Understanding its structure is essential for accurate modeling. The eyeball comprises three distinct layers: the outermost layer, consisting of the cornea and sclera; the middle layer, which contains the primary blood supply, iris, and pupil; and the innermost layer, made up of the retina. Studying detailed images and diagrams of the eye’s anatomy will give you a clearer understanding of the shapes and features that need replicating. This knowledge will also guide you in selecting the appropriate tools and determining the necessary steps for the modeling process. Furthermore, assembling a comprehensive catalog of high-quality reference images will significantly enhance the realism and intricacy of your 3D eye model, enabling you to capture subtle details with greater precision.

Gaining a solid understanding of eye anatomy is indispensable for grasping the details of what you aim to achieve in your 3D modeling process. However, taking your learning a step further by sketching out the anatomy can make a significant difference. Sketching acts as a practical rehearsal after you’ve studied the structure and features of the eye. It doesn’t have to be a perfect or realistic drawing, nor does it need to be artistically beautiful. Even a simple outline or rough representation will suffice. The primary goal of sketching is to reinforce your memory of the various parts and intricate details of the eye. This practice ensures that you retain the information better, reducing the need to repeatedly refer back to reference images during the time you’re modeling 3D eyes.

In many tutorial videos, artists commonly rely on the sphere shape as the foundation for modeling various parts of the eye, including the eyeball, cornea, and lens. This approach simplifies the process and provides a versatile starting point for creating realistic shapes.

The first step to model 3D eyes involves using a sphere to model the eyeball. It’s generally recommended to start with a perfectly round sphere, as this is the safest and most accurate base. To shape the iris and pupil, you can scale the vertices inward on a small section of the sphere and add additional loops to refine the details.

The second step is to use another sphere to create the lens, which is positioned inside the eyeball. This step requires some adjustments since the lens is not perfectly spherical; its vertices will need to be carefully reshaped to achieve the correct form.

The third step involves using yet another sphere to model the cornea. Similar to the lens, the cornea is not entirely round, so you’ll need to manipulate the vertices to match its natural curvature. By following these steps and refining the shapes as needed, you can create the essential structures of the eye with accuracy and detail.

The next crucial step in modeling a realistic 3D eye is applying textures, which bring the model to life by adding color, details, and surface variations. Texturing involves overlaying a 2D image onto the surface of a 3D model to simulate the intricate details of a real object. This process can be achieved using various tools, such as Photoshop, Substance Painter, or available techniques in 3D software like Blender or Maya. One of the most challenging aspects of texturing is recreating the complex and detailed appearance of a real-life iris, as it contains numerous intricate patterns and subtle variations.

To achieve maximum realism, it’s highly recommended to use a combination of texture types. For example, Diffuse Texture is essential for defining the base color and visible details, such as the intricate iris patterns and the veins in the sclera. Normal Map can be used to simulate fine surface details, like the delicate ridges in the iris and the slight texture of the sclera. Specular Map is key for controlling the reflective properties of the surface, particularly the cornea’s glossy appearance, while Roughness Map determines the smoothness or roughness of the eye’s surface, enhancing its overall realism.

If time is limited, you can opt to source pre-made textures from online libraries, many of which offer either free or paid options. This can significantly speed up the texturing process while still providing high-quality results for your 3D eye model.

To model 3D eyes which can be more realistic, adding shadows and highlights is an important step because the eye is often the focal point of a character, playing a vital role in conveying life, emotion, and a sense of realism. The eye’s glossy and reflective nature, along with its complex interaction with light, makes accurate rendering of these elements essential. Highlights are particularly important for replicating the wet and shiny appearance of the cornea, while shadows add depth and definition to the sclera and the iris, enhancing the model’s overall lifelike quality.

To further elevate the realism of your eye model, incorporating small details and subtle variations is key. Features such as wrinkles around the eye, delicate veins on the sclera, tears, or realistic reflections can significantly enhance the uniqueness and authenticity of the model. These intricate details can be achieved through a variety of techniques, including sculpting fine features, hand-painting textures, or adding extra geometry to the model. These finishing touches ensure the eye stands out as a dynamic and convincing element in your character design.

In case you want to focus on other parts of the body crafting rather than to model 3D eyes, you can use an instant model. With The FlippedNormals Eye Kit, you can instantly drag and drop the model to your character, saving you quite a time from modeling the eyes to focusing on other parts of your human model. The eye model is realistic enough to be used in either VFX or the game at close or distant angles.

The FlippedNormals Eye Kit includes 6 iris colors (blue, brown, dark brown, green, hazel, and grey), together with 2 sclera variations (bright and dark).

The kit is ready to use in Arnold for Maya, VRay for Maya, Blender, and Modo. With just some easy steps like importing the file or dragging on a slider, you can change pupil dilation and constriction. With other software, you will need to import FBX or OBJ files. Not all software; however, interprets them the same way, you might see minor discrepancies when importing an OBJ across different platforms.

For the best final result, not only a complicated model and appropriate rendering software are required but also a computer with a powerful configuration. iRender provides high configurations of machines with upmarket specifications like AMD Ryzen™ Threadripper™ PRO 3955WX @ 3.9 – 4.2GHz or AMD Ryzen™ Threadripper™ PRO 5975WX @ 3.6 – 4.5GHz, RAM 256GB, Storage NVMe SSD 2TB. Most importantly, we always update to the latest GPU technology.

Whatever modeling software and render engines you use, you still can find a suitable PC at iRender. You can consider our packages and their configuration here.

Let’s see how fast Arnold for Maya, VRay for Maya render on our servers!

Why can iRender be a great render farm for you?

In addition to high-configuration servers, iRender also provides many other utilities to bring the best experience for users.

• Dedicated server for individuals: You have full control and access to the server you rent. The working environment (installed apps, files) will be stored for the next use.
• Easy and free file-transferring between your computer and iRender’s server: The transferring task can be done via “GPU iRender” application for Windows and the “iRender Drive” application for MacOS.
• 24/7 assistance: iRender’s attentive agents are always ready to support all your queries.
• All software compatibility: iRender’s PCs are built to meet the configuration needs of all 3D software and rendering tools at a variety of cost levels for users to choose from.

REGISTER NOW to get the free trial today—don’t miss out!

If you have any questions, please get in touch with me through email duongdt@irender.vn or our 24/7 support team for a quick response.

Thank you for reading & Happy Rendering!

Source: flippednormals, linkedin, daisie blog, youtube 

Autodesk Arnold, although is not a common choice for Cinema 4D like Redshift and Octane, still manages to be one of the most versatile render engines and proves its advantages in handling sophisticated and demanding scenes. In this article, let’s see how you can work with Cinema 4D and Arnold on iRender powerful remote machine.

iRender provides remote machines with the latest pre-installed Cinema 4D. You can always choose to create one by going to Machine GPU > Create machine > choose the server you want to use > choose Cinema 4D in the dropdown menu Software pre-installed.

After you have done creating the machine with preinstalled Cinema 4D, just Boot it up and Connect.

Right now iRender provides each user one license of Cinema 4D for free, so you can activate and use our Cinema 4D license following this instructions.

Then we move to the next step to set up Arnold on the remote machine.

This instructions below will show you how to set up Arnold on a Windows machine.

Arnold for Cinema 4D is C4DtoA plug-in, and it is distributed as an executable file. After you connect to iRender remote machine, you will realize that it looks like a normal computer with browser and internet and some basic software.

Because iRender doesn’t provide Arnold license, now you should go to the internet and download C4DtoA from the Autodesk Account Portal using your own Autodesk account. Please note that this instruction uses C4DtoA for Cinema 4D R25 images, but C4DtoA 4.7.9 version is the one compatible with the pre-installed Cinema 4D 2025.0.2.

After it’s done, you double click on the downloaded .exe file to start the installation. Just click through the Setup Wizard until the setup is completed.

Select the directory where your Cinema 4D is installed. C4DtoA installer will auto-detect the installation path.

Now choose the folder where C4DtoA will appear in the Start menu.

You can click Install to start the installation and click Finish to close the Setup Wizard.

Start Cinema 4D and you should see the Arnold plugin menu in the main menu bar as below:

Now you are able to render/modify/set-up your project with Arnold in Cinema 4D.

iRender provide to you high performance and configurable server system for 3D rendering, AI Training, VR & AR, simulation, etc. We believe that design and creative activities are private and personal that only you artists will know what you want with your animation. That’s the reason why we provide remote server so that you can install any software you need, and do whatever you like with your project.

You will only need to install your software for the first time, and next time you connect to the computer everything is ready for use.

Arnold developers have improved the render engine in the latest version, which helps it utilize multiple GPUs more smoothly. At iRender, we offer tailored packages with state of the art multi RTX 4090/3090 for Cinema 4D and Arnold users.

You can see that our configuration above are all more than enough to have a project in Cinema 4D with Arnold renderer run smoothly. Processor is AMD Ryzen Threadripper Pro 3955WX and .AMD Ryzen Threadripper Pro 5975WX. RAM 256GB. We also provide storage NVMe SSD with 2TB. With those hardware, you can be assured that your scene will load faster, more stable when running with multiple software.

Come to the most important factor Video card (GPU). RTX4090 comes first, the speed is 80% and 64% faster than RTX 3080Ti and RTX 3090Ti relatively, proving it to be the best one in terms of speed.

Check out more to see why RTX 4090 is the best choice for Arnold rendering: How does Autodesk Arnold perform on RTX4090?

Plus, at iRender, we provide you more support than just those config.

If 24GB VRam is not enough for your scene, we always have NVLink to help you access more than that. You can access this article to know how NVLink benefits your 3D projects.

iRender offers a powerful and free file transfer tool: iRender drive for macOS or Linux users. For Windows users, we recommend using our all-in-one application iRender GPU to work, and you don’t need to come to our website.

Besides houly rental above, you can always save from 10% to 20% with our Rental Plan feature. For those who’s in need of server more than a day, or have extremely large project, we advise to choose daily/ weekly/monthly rental package. The discount is attractive (up to 10% for daily packages, 20% on weekly and monthly packages), and you don’t have to worry about over-charging if you forget to shutdown the server.

Helping you to handle the problem quickly, effectively, saving you both time and money.

When you use iRender, you can free your computer during the hardest and most arduous part – rendering. That is also the reason that Render Farm service is becoming more and more popular and essential. However, as far as we know, iRender is proud to be one of the very few rendering service that support powerful and state of the art RTX4090/3090.

With the above advantages and the machine configuration packages that iRender has just released, we believe that Cinema 4D and Arnold users will have the most comfortable, quickest, and most effective rendering time.

Right now, our users are free to use one of our Cinema 4D license on the remote machine. You just need to create a machine with pre-installed C4D and activate it via our license app. Regarding Arnold, kindly install and add your own license following the instructions in this article.

You can create an account via this link to experience our service. And don’t hesitate to contact us via WhatsApp: (+84) 916806116 for advice and support.

Thank you & Happy Rendering!

Source and images: help.autodesk.com

Maya is a 3D modeling software that provides various tools for creating 3D models, from simple shapes to complex organic forms. In this article, let’s discover how to set up Arnold cameras in the Maya user interface with iRender!

Maya is a 3D modeling software that provides a multitude of tools for creating 3D models, from simple shapes to complex organic forms. Additionally, it has an advanced animation system that lets you add movement, deformations, and other effects to make your models come to life.

Arnold is the production-quality render engine that comes included with Maya.  Arnold is an advanced Monte Carlo ray tracing renderer built for the demands of feature-length animation and visual effects movies.

So how to set up Arnold cameras in the Maya? Let’s explore now!

To change the Arnold camera settings, you need to use the Arnold tab in Maya’s Attribute Editor for the camera object (make sure you scroll down past the standard Maya ‘Camera Attributes’ tab to the tab marked Arnold and expand it).

Camera Motion Blur enables you to turn camera motion blur on or off. ‘Use Global Settings’ will use the value set in the motion blur tab from the MtoA global render settings. This option can be useful when there are multiple cameras in a scene that may or may not require motion blur. 

Using Global Shutter (enabled by default) signifies that the camera should use the values from the Render Settings, in the motion blur tab. When you want to set a specific shutter in the camera, you can disable Use Global Shutter and then it will be taken into account.

Let’s explore other options for setting up Arnold cameras in the Maya below!

This cyl_camera node provides a cylindrical view, which is useful for creating panoramic views. A common use of this camera projection is to allow the creation of environment maps (in ‘lat-long’ or latitude-longitude format) for later use as reflection maps or for environment lighting. Note that Depth of Field is not available for this camera type.

• Horizontal Fov: Controls the field of view in the horizontal axis. 

• Vertical FOV: Controls the field of view in the vertical axis.

• Projective: The Arnold cylindrical camera can operate in two modes.

• • • With ‘projective’ set to off, all rays have a common origin – they are cast from the center of the cylinder. In the vertical direction, the camera acts as a pinhole camera, and in the horizontal direction, it acts as a spherical camera. 
    • With ‘projective’ set to on, the camera is more of a true cylindrical camera; in the vertical direction the camera acts as an orthographic view, and in the horizontal direction it acts as a spherical camera.

This fisheye_camera node provides a fish-eye lens-type view. The depth of field and aperture controls are similar to the standard perspective camera, but the fisheye camera also provides control over the field of view.

This ortho_camera node provides an orthographic view. There is no perspective, so objects do not get smaller as they get farther away from the camera.

This perp_camera node provides a perspective view, like a regular camera. This is the ‘standard’ camera type that you will probably use most often. In addition to a normal perspective, this camera type also provides controls for the depth of field, and the focal length of the camera, as well as controls, to do with the aperture of the camera. This allows various camera lens effects, including bokeh, to be simulated.

See more: What’s new in Maya 2025.2?

• Radial Distortion: Radial distortion, with negative and positive values resulting in a pincushion and barrel distortion respectively. Real-world lenses can show such distortion when using, for example, a very short focal length or a high zoom.

• Radial Distortion Type: A lens radial distortion compatible with the 3ds Max physical camera. It is selectable through persp_camera.radial_distortion_type cubic_inverse. The classic cubic type is still the default. 

• Lens Tilt Angle: Controls lens tilt angles concerning the projection plane. The horizontal and vertical angles are specified in degrees. This is useful in architectural renderings to compensate for perspective transformation for vertical lines. 
• Lens Shift: Shifts the lens position. This is useful to recenter the subject after using tilt. The shift is given in normalized screen coordinates: +1 will move the frame center to the right or bottom edge. Note that lens shift will affect the render in a different way than screen_window, notably with distortions or vignetting since one is a lens effect and the other just selects the part of the rendered image that will be output. 

The spherical camera is a camera lens that has a spherical appearance. A common use of this camera projection is to allow the creation of environment maps (in spherical map format) for later use as reflection maps or for environment lighting.

To get the full spherical range, the camera’s screen window must be set to [-1,-1] to [1,1]. Note that the same mapping could be achieved in the cylindrical camera with careful setting of the Horizontal FOV, Vertical FOV, and Projective parameters but the spherical camera is provided for convenience.

This is a generic VR camera implementation. It features two cameras offset by a distance with a specific 360º projection. Its main advantages are:

• • • It works with any scene component that can be rendered in an offline renderer: meshes, hair, particles, volumetrics and complex shading networks.
    • An easy learning curve to begin to create VR content. Just add the VR camera to your existing project.
    • Modest hardware requisites to reproduce the content. Any platform that can reproduce a video with the required projection is fine to experience the generated content.
    • Content that is easy to distribute either as a video file or via video streaming. It can be reproduced using dedicated software or an app or with web standards like WebGL, or WebVR. It also works with Google and Facebook 360 3D videos.

In contrast, VR camera has some disadvantages

• • • Poles: By default, poles will show very evident artifacts. This requires you to adjust the stereoscopic effect for each scene and smooth it near the poles, thus diminishing the effect.
    • Tilt: Due to the way the stereoscopic effect is done, tilting your head will destroy the stereoscopic perception.
    • Parallax: When you move your head along any axis, there is a change in the viewpoint that the offline VR scene can’t take into account. This can diminish the immersion of the experience since we can only react to head rotations.

iRender provides high-configuration servers that increase CPU and GPU rendering speeds. We offer the most powerful RTX 4090 configuration packages on the market, all equipped with AMD RyzenTM ThreadripperTM PRO 3955WX @ 3.9 – 4.2GHz and AMD Ryzen™ Threadripper™ PRO 5975WX @ 3.6 – 4.5GHz processors, 256GB RAM and 2T NVMe SSD hard drive capacity. With a wide range of GPU servers (1/2/4/6/8x) – RTX 4090, you can choose the server that suits your needs to start the rendering process. Besides, our servers also have 256GB RAM and 2TB SSD storage – iRender’s machines can handle any Maya project demands with Arnold. 

Why should you choose iRender?

• Full Control: We provide incredibly strong computers that are prepared for GPU rendering. When you use our service, you have complete control and freedom over your machine 
• Go Green: Our program GoGreen, which aims to reduce and/or avoid emissions of greenhouse gases and local air pollutants, is an expression of our strong sense of responsibility. Since its inception, our sustainable goal has been to focus on people. We keep green and keep our planet clean.
• Real-human 24/7 Support: Our professional support agents and technicians guarantee are willing to assist you to have the best rendering experience.

Looking at our servers to find the best choice for your Arnold rendering!

Let’s watch our tutorial below to get familiar with our service!

Currently, iRender offers a special promotion for new users, a 100% bonus program for the first deposit within 24 hours of registration, making it an attractive option for those looking to optimize their rendering budget.

For more detailed information, please contact us via Live chat 24/7 or WhatsApp: +(84)915875500 or Email: vyvtk@irender.vn

iRender – Happy rendering!

Image source and reference: help.autodesk.com

Cinema 4D together with Arnold is one of the most famous 3D software and render engines which artists and studios often use in many fields, because of its convenience and versatility. In Cinema 4D 2024.4, we see the release of Particle system helping you to generate particles in Arnold. Let’s explore with iRender.

You will need to render all Particle Groups in the scene by default as spheres with a default standard_surface shader displaying the color of the particles.

To modify the settings, you have to add an Arnold tag to the Particle Group object.

Please note that Emitters do not store any particles, thus adding the Arnold tag and material to an Emitter has no effect. You have to add them to particle groups.

Multi Groups can hold and modify multiple particle groups.They are not rendered by default. To render them, you have to add an Arnold tag to the Multi Group object and change the Render mode.

Multi Groups and Particle Groups both store particles, and both can render particles twice. Therefore if you enable rendering of a Multi Group, you may have to disable rendering of the respective Particle Groups.

To read specific properties of the particles, such as the color and age, you can use a user_data shader in a shading graph.

A note for you: Materials have to be applied to Particle Groups and not Emitters, just like the Arnold tag.

You can export particle properties (channels) as user parameters and read them in a shader graph via user_data shaders. Radius and color is exported by default, but you can export all other available properties, such as:

• • • • velocity (vector)
      • angular velocity (vector)
      • age (float)
      • lifetime (float)
      • distance (float)

You can map channels between 0-1 range (between the minimum and maximum value in the current frame) where it’s possible. If you want to map the values to a custom range, you can export the minimum and maximum values as user data. They are labelled with the _min and _max postfix, such as ‘distance_min’ and ‘distance_max’.

You can control here how the motion blur effect is rendered. Vector motion blur is enabled by default, that means the velocity and angular velocity vectors are used to calculate particle motion in the given frame.

In some cases, such as when particles move along a curve, vector motion blur does not give you the desired result, and motion blur has to be calculated based on the simulated position instead (Use motion vector turned off). Note, that particles are not simulated in subframes, therefore you have to cache the simulation to render motion blur properly.

To display motion blur in the IPR you have to cache the simulation.

iRender provide to you high performance and configurable server system for 3D rendering, AI Training, VR & AR, simulation, etc. We believe that design and creative activities are private and personal that only you artists will know what you want with your animation. That’s the reason why we provide remote server so that you can install any software you need, and do whatever you like with your project.

You will only need to install your software for the first time, and next time you connect to the computer everything is ready for use.

Arnold developers have improved the render engine in the latest version, which helps it utilize multiple GPUs more smoothly. At iRender, we offer tailored packages with state of the art multi RTX 4090/3090 for Cinema 4D and Arnold users.

You can see that our configuration above are all more than enough to have a project in Cinema 4D with Arnold renderer run smoothly. Processor is AMD Ryzen Threadripper Pro 3955WX and .AMD Ryzen Threadripper Pro 5975WX. RAM 256GB. We also provide storage NVMe SSD with 2TB. With those hardware, you can be assured that your scene will load faster, more stable when running with multiple software.

Come to the most important factor Video card (GPU). RTX4090 comes first, the speed is 80% and 64% faster than RTX 3080Ti and RTX 3090Ti relatively, proving it to be the best one in terms of speed.

Check out more to see why RTX 4090 is the best choice for Arnold rendering: How does Autodesk Arnold perform on RTX4090?

Plus, at iRender, we provide you more support than just those config.

If 24GB VRam is not enough for your scene, we always have NVLink to help you access more than that. You can access this article to know how NVLink benefits your 3D projects.

iRender offers a powerful and free file transfer tool: iRender drive for macOS or Linux users. For Windows users, we recommend using our all-in-one application iRender GPU to work, and you don’t need to come to our website.

Besides houly rental above, you can always save from 10% to 20% with our Rental Plan feature. For those who’s in need of server more than a day, or have extremely large project, we advise to choose daily/ weekly/monthly rental package. The discount is attractive (up to 10% for daily packages, 20% on weekly and monthly packages), and you don’t have to worry about over-charging if you forget to shutdown the server.

Helping you to handle the problem quickly, effectively, saving you both time and money.

When you use iRender, you can free your computer during the hardest and most arduous part – rendering. That is also the reason that Render Farm service is becoming more and more popular and essential. However, as far as we know, iRender is proud to be one of the very few rendering service that support powerful and state of the art RTX4090/3090.

With the above advantages and the machine configuration packages that iRender has just released, we believe that Cinema 4D and Arnold users will have the most comfortable, quickest, and most effective rendering time.

Right now, our users are free to use one of our Cinema 4D license on the remote machine. You just need to create a machine wit pre-installed C4D and activate it via our license app. Regarding Arnold, kindly install and add your own license.

You can create an account via this link to experience our service. And don’t hesitate to contact us via WhatsApp: (+84) 916806116 for advice and support.

Thank you & Happy Rendering!

Source and images: help.autodesk.com