OTOY Forums

Hi all,

Here is a hotfix build for 1.8. We have adressed some of the the more glaring issues. When you still experience issues, please let us know.

To see what the future holds, check out our Trello!
https://trello.com/b/1HYU24R0/octanec4d

2026.1 - v1.8.1 plugin revisions
Changes

• Fixed issue where Displacement Height increased every time a C4D scene was loaded.
• "Use Denoised Beauty" now works correctly again.
• Octane Settings now load properly when the settings window already existed in a C4D layout preset.
• Octane logging options now work correctly again.
• Neural Radiance Cache setting now works correctly and no longer causes logging errors.
• Fixed Anisotropy/Index map logging errors.
• Octane Baking Camera no longer causes logging errors.
• Fixed PBR Material logging error.
• Fixed issue where some copied nodes appeared white.
• Corrected Post Processing pins UI.
• Removed "expires in X days" from the Live Viewer when no expiration applies.
• Fixed OpenPBR logging errors
• Fixed MaterialX image nodes logging errors
• Fixed issue where float pins UI had a stepsize of 1 when they shouldnt

Downloads:
WINDOWS STUDIO+ 2026.1 - v1.8.1 (R21-R2026)
Installer: https://render.otoy.com/customerdownloads/plugins/33/b8/de/b3/OctaneRender_Studio%2B_2026.1_for_Cinema4D_v1.8.1.exe
Archive: https://render.otoy.com/customerdownloads/plugins/bb/e9/2d/d0/OctaneRender_Studio%2B_2026.1_for_Cinema4D_v1.8.1_Bundle.zip

MacOS Prime 2026.1 - v1.8.1 (R21-R2026)
Archive: https://render.otoy.com/plugindownloads/07/66/a8/24/OctaneRender_Prime_2026.1_for_Cinema4D_v1.8.1.zip

WINDOWS DEMO 2026.1 - v1.8.1 (R21-R2026)
Installer: https://render.otoy.com/plugindownloads/34/4f/29/01/OctaneRender_Demo_2026.1_for_Cinema4D_v1.8.1.exe
Archive: https://render.otoy.com/plugindownloads/88/03/52/31/OctaneRender_Demo_2026.1_for_Cinema4D_v1.8.1_Bundle.zip

2026.1 - Nodes
Installer: OctaneRender Studio+ 2026.1 Node for Windows (installer)
Archive: OctaneRender Studio+ 2026.1 Node for Windows (ZIP archive)
Linux: OctaneRender Studio+ 2026.1 Node for Linux



2026.1 - v1.8 plugin revisions

• Major Changes
  • Updated to Octane 2026.1
  • Support for C4D’s User Data Tag (via AttributeTex node)
  • Mograph Data support (via AttributeTex node)
  • Added OpenPBR Material
• Material Changes
  • IOR is now a texture input instead of a float
  • Anisotropic is now a texture input instead of a float
  • CMYK added Halftone texture node
  • Added MaterialX nodes: Fractal2D, LatLongImage, HexTiledImage, and HexTiledNormalMap
  • Added displacement node quality pin
  • Added Sheen BRDF
  • Added Oren–Nayar (energy preserving) to BRDFs
  • Improved UI layout for various nodes and objects
• Scene & Geometry
  • Added TraceSets to Octane Lights and Environments
  • Improved Meshlets support
  • Updated Vectron Object variables for 2026
  • Added new pins to Gaussian Plat Object: Clip Bounds Transform, Clipping mode, Priority,
• Textures
  • Added Virtual Texture option to texture nodes
  • Known issue: Virtual textures make material previews render black
• Settings
  • Added UI for new Upsampling settings on the imager
  • Added Kernel compatibility modes
• AOV
  • Added new nodes: Cryptomatte Mask, Expand/Contract, Reblend, Unblend
  • Added Environment (unoccluded) render AOV
  • Added PostFX media AOV
  • Added “Lock render” option to AOVs
  • Added “Effects” to multiple AOV nodes
  • Renamed Checkpoint → Snapshot
  • Various minor text/name updates
  • Added "Info/Gaussian Splat Info AOV"
  • Added "Beauty – Other/Gaussian Splat AOV"
  • Adding an Alpha AOV in the Render AOV Tab now works correctly
• Fixes
  • Fixed infinite VP rendering with Use denoised beauty pass + info channel
  • Fixed crash related to image tiles
  • TraceSets now work properly in the Picture Viewer
• Known Issues
  • Virtual textures make texture/material previews render black (but work in Live Viewer)
  • Duplicate "Open In Editor" button in PBR material basic tab
  • Mac has an incorrect renderfailure detection error when there is no render failure:
    "<<< Render failure detected!!! >>> Please check render statistics to solve the problem."
  • Gaussians splats have a wireframe material - this might be removed at a later date

Support
Some important notes about these builds:

The minimum NVIDIA driver version that is required by this version is 528. You can launch Octane with an older driver version, but it will fail to render and it will produce an error message in the log.

Open Image Denoise is supported on CUDA compute model 7 and later, we fallback to the CPU version on machine with older models.


IN ANY CRASH CASE PLEASE DO THESE!!!
If you see CUDA errors follow 1,2,3,4.
1- Use NVIDIA STUDIO drivers, not Game Ready versions. If you have stability issues try different drivers, some of them could cause instability issues. Make a clean install while doing this to be sure previous files completely removed.
2- Check GPU frequency. Overclocking would cause instability issues
3- Check PSU. Insufficient power output would cause instability issues
4- Check the free amount of GPU's VRAM and system's RAM while working. Low VRAM will/may cause CUDA errors. Be aware of some generator objects will have different triangle count in Picture Viewer than Live Viewer. It’s like “editor/render” parameter. Just try to use the same value. Also try to optimize your scene for polygon count, even use smaller images. Try to use Octane texture nodes rather than using C4D texture/shaders.
Alternatively, use V4 and Out-of-core(OOC) function. Increase RAM for OOC and It should not exceed physical RAM amount. Check TDR value and increase if it's necessary.
5- If you see C4D crashes without CUDA errors, then send us bugreport.zip, screen-shots and video capture to show process and crash moment. Also please send us a sample scene in a format of C4D or ORBX to let us investigate and test it. Alternatively, try to delete/hide some objects/materials until crash gone away. If you find what's causing crashes, send us a sample scene to let us for investigating and bring a fix or solution.
Thanks for helping the development by your feedbacks! It’s impossible to quickly catch every case without user feedbacks! It’s the same procedure as other companies do like Maxon/etc...



Please note the macOS build will only work correctly on macOS 14.5 and newer, and only on Apple Silicon.

Requirements:
-You'll need to update your Cinema 4D to latest versions(R21.115, S22.118, R23.110, R24.111, R25.117, R26.107, R2023.2, R2024.4.0, R2025.0.2). Otherwise, the plugin will not work and not appear in menus.
-Internet connection for activation, be sure that C4D and Octane will not be blocked by the firewall and any antivirus software.
-Nvidia drivers at least Nvidia Studio Drivers(minimum 528) and be careful with latest Game Ready drivers which can cause cuda errors. Stay with stable one for you.


ONLINE HELP MANUAL
Use embedded help buttons from Octane nodes and windows
or from link: https://docs.otoy.com/cinema4d/OctaneRenderforCinema4D.html


Archive Installation
First, remove all octane related stuff from plugins and the main folder of Cinema4D.

Extract all files to Cinema4D\plugins\c4dOctane directory.
Also, download manual.zip and extract to c4dOctane directory if it's not available in place.

There are a few files for each one is for different Cinema4D version. Remove all except the file is for your version.
Ex. if you have Cinema4D R2023, keep only "c4dOctane-R2023.xdl64" and delete c4dOctane-R26.xdl64, c4dOctane-R25.xdl64, c4dOctane-R24.xdl64, c4dOctane-R23.xdl64, etc..

Thanks, team.
Will give a try.
Regards,

Well, was working great till I decided to open Render Kernel options window.
Than I got this crash.
Crash easy to replicate.

Kalua wrote: Tue Dec 02, 2025 5:14 pm Well, was working great till I decided to open Render Kernel options window.
Than I got this crash.
Crash easy to replicate.

Is this happening only on a specific scene? And what are the exact steps?
I can't replicate this issue here yet.

I can repro the log error with the LIght Mixer node. You are using the old one from the presets, but there is a new one in the Output AOV layer list (we will redo the presets soon).
But that does not lead to any crash here.

DinoMuhic wrote: Wed Dec 03, 2025 2:43 pm

Kalua wrote: Tue Dec 02, 2025 5:14 pm Well, was working great till I decided to open Render Kernel options window.
Than I got this crash.
Crash easy to replicate.

Is this happening only on a specific scene? And what are the exact steps?
I can't replicate this issue here yet.

I can repro the log error with the LIght Mixer node. You are using the old one from the presets, but there is a new one in the Output AOV layer list (we will redo the presets soon).
But that does not lead to any crash here.

Has happened with 2 different scenes (made in older versions of Octane as u can read in the log). Though I have systematically used those scenes to test all new plugin versions and incrementally saved. First time I see a new Octane version give me such a severe crash with minimum interaction.
I open Liveview window, hit render, open the kernel window and the log report appears.
Will try with other scenes.

PS:Yep... 3rd scene with crash
Will record a .gif

Here, Team
Has happened in every single scene I have opened so far.
Hope it helps.

Hi,

What happens if you click on the gear icon in Live View to recall Kernel settings, instead of the button/shortcut in your layout?

ciao,
Beppe

There are several issues with the OpenPBR material in this release. When Metalness is set to 1, the Specular Weight parameter does not behave as expected. It works correctly in Standalone, but not in the OpenPBR material in Octane for Cinema 4d.

The Coat Darkening parameter also does not appear to function as intended. it does not do anything.

In addition, there is currently no Anisotropy Tangent input for the Specular layer, which makes it unclear how to rotate anisotropic highlights in an OpenPBR material. Other renderers, such as Redshift and Arnold, provide an Anisotropy Tangent input in their OpenPBR implementations, so it would be useful to know whether a similar control is planned or available in Octane.

bepeg4d wrote: Thu Dec 04, 2025 7:49 am Hi,

What happens if you click on the gear icon in Live View to recall Kernel settings, instead of the button/shortcut in your layout?

ciao,
Beppe

Same thing happens.
However, in this scene I particularly show now, If I open the Kernel settings window first, and hit render later, then error doesn't happen.
If I close live-view window and settings, and open again... hit render (without settings opened) I get the error again.
I saw this fail too though in other scenes.

Kalua wrote: Thu Dec 04, 2025 3:47 pm

bepeg4d wrote: Thu Dec 04, 2025 7:49 am Hi,

What happens if you click on the gear icon in Live View to recall Kernel settings, instead of the button/shortcut in your layout?

ciao,
Beppe

Same thing happens.
However, in this scene I particularly show now, If I open the Kernel settings window first, and hit render later, then error doesn't happen.
If I close live-view window and settings, and open again... hit render (without settings opened) I get the error again.
I saw this fail too though in other scenes.

Thanks for the report, but we will need a zipped project file with all assets from you to reproduce this, since we can't make it crash in our scenes.

Can you send it to us please?