OctaneRender 2025 for Rhino (TEST and STABLE)

[Lekip]

Hi Paul,

I feel the same way. No worries, thanks for taking your time looking into this. Curious to see what the guys find

[face_off]

Hi Max

I have heard back from OTOY, and spent a lot of time on this. If I start Rhino and add a sphere and add your HDR file as a Texture Environment, the curves match. But there is something in your scene which is causing the curves to not match. If I start Rhino, add a sphere, add your HDR as a Texture Environment, Standalone and Rhino EXR's curves match. In order to debug this further, I have put together a build where you can select the Force Tone Matching and Premultiplied Alpha settings when saving a multi-layer EXR. I am hoping this will give you enough options to try to isolate the exact issue.

https://render.otoy.com/customerdownloads/plugins/3b/c3/21/84/OctaneRenderForRhino7_2025_2_1_145_STUDIO.rhi

Thanks

Paul

[Lekip]

Hi Paul!

Had some other stuff to finish, so it took a bit until I could test.

With the updated plugin, I was able to export renders with HDR information by turning off forced tonemapping and exporting in Linear.

Premultiplied Alpha did not affect the results as far as I can tell.

Exporting in Tonemapped instead of Linear resulted in the same non-HDR data, as it does in Standalone.

To me, this seems to have fixed it I don't know why you had issues with my file and its environment. I can't reproduce that. Maybe there's something more to this still, but as far as I'm concerned, I'm happy

Thanks again for taking care of me, it's greatly appreciated. This will save me quite some effort going forward. If you want to look further into this and need something else from me, let me know. I'll try to help if I can.

Cheers,
Max

[face_off]

Thanks Max

Glad it sorted out your issue. I will do a full release of this version in the next few days.

Paul

[face_off]

I have updated the installers at the top of this link with:

2025.2.1.145 (12-Aug-2025)
- Added the option to select the Force Tone Matching and Premultiplied Alpha settings when saving a multi-layer EXR
- Implemented a number of fixes related to nodeGraph material issues

Thanks

Paul