VRAY 7 ACEScg Issue

[thomas_pisciottano1]

These two renders between Vray 6 and 7 are drastically different. I am using the colour management settings inside of 3D Max for both images, and all my textures are set to the correct colour spaces. I might be misinterpreting something with the new update, and any help sorting this out would be greatly appreciated.

[hermit.crab]

Mind if you strip down the scene and attach/send it along with a screencap of your Color Management settings?

[thomas_pisciottano1]

Mind if you strip down the scene and attach/send it along with a screencap of your Color Management settings?

Sent in a request, thank you.

[hermit.crab]

Thanks for the provided scene. Based on my tests, I don't see any issues with your setup. When rendering in V-Ray 7, the image looks like the left screenshot (view_03.jpg). I compared it with V-Ray 6 and got the same results. The right-hand side image seems rendered with Rendering Primitives (Render Setup > Settings > Color Management) set to sRGB rather than ACEScg. Make sure it's set to ACEScg.

[thomas_pisciottano1]

Thanks for the provided scene. Based on my tests, I don't see any issues with your setup. When rendering in V-Ray 7, the image looks like the left screenshot (view_03.jpg). I compared it with V-Ray 6 and got the same results. The right-hand side image seems rendered with Rendering Primitives (Render Setup > Settings > Color Management) set to sRGB rather than ACEScg. Make sure it's set to ACEScg.

Hello Aleksandar,
I was sure my color management settings were set correct in the render setup, I ran a second test to make sure and I am still experiencing the same issue. I have tried using a custom OCIO file and still get the same error.

[thomas_pisciottano1]

I also tested on multiple other workstations in my studio, and we are getting the same exact error.

[hermit.crab]

I'm troubleshooting the scene as we speak. Can you try the following for me:
1. Switch to CPU
2. Render (just wait until the LC starts calculating) -> Color should be ACES
3. Switch back to GPU
4. Render -> Color should be ACES
5. Resave the scene and the issue should'nt appear again

Not yet sure what's causing this, but at least you can continue working until I find out.

[thomas_pisciottano1]

Thank you, Aleksandar. It works perfectly now! In 3D Max, the GPU is the starting render engine by default, and the fault could lie in that.

[hermit.crab]

I have found the culprit—the "Use System Memory for Textures" option, which is active by default in V-Ray 7. It seems to ignore the ACEScg setup. I logged it (internal bug-tracker id: VGPU-6668 ). Switching to CPU and back to GPU simply disables the checkbox, which is why it resolves the issue.

[Muhammed_Hamed]

We will fix this as soon as possible, sorry for the inconvenience.

Best,
Muhammed