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When rendering with V-Ray Standalone, an OCIO configuration can be set with the following OCIO environment variables:

VRAY_VFB_OCIO_INPUT_COLORSPACE – Specifies default OCIO input color space.

VRAY_VFB_OCIO_DISPLAY_DEVICE – Specifies default OCIO display device.

VRAY_VFB_OCIO_VIEW_TRANSFORM – Specifies default OCIO view transform.

For example, set a default OCIO input color space, display device, and view transform:

Code Block
Windows: set VRAY_VFB_OCIO_INPUT_COLORSPACE = ACES - ACEScg
Windows: set VRAY_VFB_OCIO_DISPLAY_DEVICE = ACES
Windows: set VRAY_VFB_OCIO_VIEW_TRANSFORM = sRGB
 
Linux: export VRAY_VFB_OCIO_INPUT_COLORSPACE = ACES - ACEScg
Linux: export VRAY_VFB_OCIO_DISPLAY_DEVICE = ACES
Linux: export VRAY_VFB_OCIO_VIEW_TRANSFORM = sRGB
 
macOS: export VRAY_VFB_OCIO_INPUT_COLORSPACE = ACES - ACEScg
macOS: export VRAY_VFB_OCIO_DISPLAY_DEVICE = ACES
macOS: export VRAY_VFB_OCIO_VIEW_TRANSFORM = sRGB

Note that without setting these variables, it is not possible to render in ACES color space with V-Ray Standalone.

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