The following parameters are visible from the Color Mapping rollout when set to the Basic Render UI Mode. Type – Sets the type of color transformation. For more information, please see the Color Mapping Types example below. Linear multiply – Simply multiplies the final image colors based on their brightness without applying any changes. Exponential – Saturates the colors based on their brightness. This can be useful in preventing burnouts in very bright areas (for example, around light sources). This mode clamps colors so that no value exceeds 255, or 1 in floating point values. HSV exponential – Similar to Exponential, but preserves the color hue and saturation instead of washing out the color towards white. Intensity exponential – Similar to Exponential, but preserves the ratio of the RGB color components and only affects the intensity of the colors. Gamma correction – This option is deprecated. Applies a gamma curve to the colors. Intensity gamma – This option is deprecated. Applies a gamma curve to the intensity of the colors instead of each channel (RGB) independently. Reinhard – A blend between Exponential and Linear multiply. The degree to which one method or the other is applied to the image is specified by the Burn value parameter. The basic settings for color mapping are set by default so that V-Ray renders out the image in linear space (Reinhard color mapping with Burn value 1.0 produces a linear result). |
Multiplier – A general multiplier for the colors before they are corrected when Type is set to Gamma correction, Intensity gamma, or Reinhard. Burn value – Available when Type is set to Reinhard. If this value is 1.0, the result is the same as setting Type to Linear multiply. If this value is 0.0, the result is the same as Exponential. Values between 0.0 and 1.0 blend the two types. Dark multiplier – Specifies the multiplier applied to dark colors when Type is set to Linear multiply, Exponential, HSV exponential, or Intensity exponential. The default value is 1.0. Bright multiplier – Specifies the multiplier applied to bright colors when Type is set to Linear multiply, Exponential, HSV exponential, or Intensity exponential. The default value is 1.0. Inverse gamma – The inverse of the gamma value when Type is set to Gamma correction or Intensity gamma. For example, for a gamma value of 2.2, this value is 1/2.2, or 0.4545. |