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UI Path: ||Parameters tab|| > Color Mapping tab (with the V-Ray Renderer node selected)

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Color Mapping Parameters

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Type – The type of transformation used. These are the possible types:

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For more information, see the Color Mapping Modes example and the Color Mapping Types with VRaySun and Sky examples below.

Dark Colors Multiplier – The multiplier for dark colors. Applies when Type is other than Reinhard.

Bright Colors Multiplier – The multiplier for bright colors. Applies when Type is other than Reinhard.

Gamma – Controls the gamma correction for the output image regardless of the color mapping mode. Note that the value here is the inverse of the one used for the Gamma correction color mapping type. For example, to correct the image for a 2.2-gamma display, you can simply set the Gamma parameter to 2.2.

Subpixel Mapping – Controls whether color mapping will be applied to the final image pixels, or to the individual sub-pixel samples.

Clamp Output – When this option is enabled, colors will be clamped after color mapping. This can be useful for anti-aliasing very bright light sources or parts of an HDR image.

Clamp Level – Specifies the level at which color components will be clamped. This parameter is available only if the  Clamp Output option is enabledAffect Background – When enabled, colors belonging to the background will also be affected.

Mode – Determines whether color mapping and/or gamma correction are burned into the final image. This option replaces the Don't affect colors (adaptation only) option from previous V-Ray versions. The possible values are:

Color Mapping Only – Color mapping is burned into the final image, but not the gamma correction. This is the default option. V-Ray will still proceed to sample the image as though both color mapping and gamma are applied, but will only apply the color correction (Linear, Reinhard, etc.) to the final result.
Color Mapping & Gamma– Both color mapping and gamma correction are burned into the final image. This corresponds to having the Don't Affect Colors option disabled in previous V-Ray versions. 
Don't Affect Colors – Neither color mapping nor gamma are burned into the final image. However, V-Ray will proceed with all its calculations as though color mapping and gamma are applied (e.g. the noise levels will be corrected accordingly). This can be useful, for example, if you know that you will apply some color correction to the image later on, but wish to keep the rendering itself in linear space for compositing purposes. This corresponds to having the Don't Affect Colors option enabled in previous V-Ray versions.

Clamp Output – When this option is enabled, colors will be clamped after color mapping. This can be useful for anti-aliasing very bright light sources or parts of an HDR image.

Clamp Level – Specifies the level at which color components will be clamped. This parameter is available only if the  Clamp Output option is enabled AnchorlinearButtonlinearButton Linear Workflow – When enabled, V-Ray will automatically apply the inverse of the Gamma correction that you have set in the Gamma field to all VRayMtl materials in your scene. This option is intended to be used only for quickly converting old scenes which are not set up with proper linear workflow in mind. This option is not a replacement for proper linear workflow. Image Exposure – Specifies additional image exposure settings.

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