--- title: "Color Correction" canonical: "https://documentation.chaos.com/space/VBLD/117638477/Color%20Correction" format: markdown --- This page provides information about the V-Ray Color Correction utility texture in V-Ray for Blender. Overview The V-Ray Color Correction utility texture enables the application of various color corrections. UI Path: ||V-Ray Node Editor|| > Shader > Add > Texture Utilitites > V-Ray Color Correction Node Input Sockets This section describes the input sockets of the node. Some sockets have dedicated parameters, which are further described below, and some sockets are just inputs. Source Color – The color node connected here will be color corrected. Hue Tint – Accepts color nodes to tint the Source Color. RGB Brightness – This slot allows color nodes to be connected to enhance the brightness of the Source Color. RGB Contrast – This slot allows color nodes to be connected to enhance the contrast of the Source Color. RGB Base – Allows a color texture to be connected to serve as a base multiplier for the Source Color. Keep this at white to not alter the Source Color. RGB Offset – This slot allows a color node to determine the color offset of the Source Color. Properties Source Color – Allows a fallback color to be applied when there is no texture connected. Texture Map – Input socket for the input of a texture map. Hue Shift – Specifies a value for the adjustment of the current color hue. Saturation – Specifies a value for the saturation or desaturation of colors. Channels Rewire Red/Green/Blue/Alpha – Allows the following channels to be assigned to the Red , Green , Blue , or Alpha channels: Red – Assigns the red channel. Green – Assigns the green channel. Blue – Assigns the blue channel. Alpha – Assigns the alpha channel. Redinv – Assigns the inverse of the red channel. Greeninv – Assigns the inverse of the green channel. Blueinv – Assigns the inverse of the blue channel. Alphainv – Assigns the inverse of the alpha channel. Monochrome – Assigns the channel to be monochrome. One – Assigns the value 1. Zero – Assigns the value 0. Color Hue Shift – Specifies a value for the adjustment of the current color hue. Saturation – Specifies a value for the saturation or desaturation of colors. Hue Tint – Specifies a color that is used to tint current colors. Tint Strength – Adjusts the strength of the hue tint. Lightness Lightness Mode – Specifies the lightness mode that is used. You can choose between Standard and Advanced mode. Standard Brightness – Adjusts the correction of the color multiplier. Contrast – Adjusts the correction of color contrast. Advanced Exposure Mode – Specifies the exposure method. Gain – In this mode, the Brightness value is a simple multiplier for the input colors. F-Stops – In this mode, the Brightness value multiplies the color intensity with photographic F-stop exposure. Increasing the Brightness by one doubles the brightness, the same as increasing the Gain by 2. For example, this mode's input value of 1.0 and Brightness of 0.0 equals 1.0 (i.e., no brightness correction). Then, Brightness 1.0 corrects the input of 1.0 to equal 2, Brightness 2.0 corrects the input of 1.0 to equal 4.0, Brightness 3.0 corrects the input of 1.0 to equal 8.0, and so on. The input is multiplied by 2 to the power of the brightness value in this mode ( * 2 ^ ). Printer Lights – When set with the same value as the Printer Lights Per Stop parameter is set, it doubles the luminance. Brightness – Affects the brightness of the input colors based on the Exposure Mode . Gamma / Contrast – Determines a float value for the gamma and contrast multipliers. Increasing gamma decreases the contrast. Base – The base value for Gamma correction. Pixel values equal to the Base are not affected. This can be useful when gamma-correcting a texture without changing certain luminance levels. Offset – Adds a uniform offset to all pixel values. Use Red/ Green/ Blue – When enabled, uses the corresponding component for the advanced RGB parameters. RGB Base – Same as Base , but controls which pixel values in the individual R/G/B channels are unaffected by the RGB Contrast . RGB Brightness – Adjusts the brightness of the RGB channels. RGB Contrast – Same as Gamma/Contrast , but for the individual R/G/B channels. RGB Offset – Same as Offset, but adds a uniform offset to the individual R/G/B channels. Printer Lights Per Stop – When Printer Lights Exposure Mode is used, this value specifies how many printer lights are equal to one f-stop, doubling or halving the brightness.