Framebuffer LUT convert to log

V-Ray V-Ray Common Render Theory
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1

Hello Chaos community,

When converting to log before applying a lut in the vray framebuffer, is Cineon the flavor of log being used? And if so, is there anyway to specify the flavor of log for the framebuffer?

We have a project that requires us to convert from linear to AlexaV3LogC before applying a display lut. When comparing the image in the vray framebuffer to the image I get in Nuke there is a subtle difference in light intensities. However if I convert to Cineon in Nuke the images match.

Hopefully this makes sense. Any advice or thoughts would be greatly appreciated.

Thanks in advance!

2

We use the Cineon conversion, yes. If you can export an OCIO profile from Nuke that does what you need, you should be able to apply this to the frame buffer.

Best regards,
Vlado

3

Thank you for the prompt response and clarifying the log flavor Vlado! We will investigate exporting and using OCIO profiles.

-chitty