This page provides information on V-Ray compatibility with the OCIO color management library.
Overivew
V-Ray includes support for the OpenColorIO (OCIO) color management library. Below are some details on the integration.
OCIO Support in the V-Ray Frame Buffer
The V-Ray Virtual Frame Buffer (VFB) includes support for OCIO display transformations. For more details on VFB support for OCIO, see the Color Corrections page. For more details on the VFB support for OCIO, see the OpenColorIO (OCIO) section in the V-Ray VFB.
VRayOCIO Texture
In an ideal scenario, textures plugged into the renderer should already be converted to linear color space (or sRGB color space for 8-bit textures). However, sometimes it is necessary to use textures stored in other color spaces (i.e. background plates) which need conversion on the fly. The VRayOCIO texture allows you to do that by applying various OCIO color corrections to other 3ds Max textures.
The OCIO corrections are slow, so use them sparingly and only when it is not possible or practical to pre-convert the texture to linear color space.
Material Editor Swatches
V-Ray optionally can apply the same OCIO transformations from the V-Ray VFB to the color swatches in the Material Editor. To enable this, set the VRAY_VFB_AFFECT_SWATCHES environment variable to 1 (setting it to 2 applies all VFB color corrections). This is currently an experimental feature and is disabled by default. It is not implemented for the VFB.