This rollout is used to pre-process the colors in RGB space. Enabled – Turns on/off all of the RGB space pre-processing operations. Brightness – An amount added to all RGBA channels. Affects alpha. Contrast – Scales the RGBA channel values around 50% intensity. 0% contrast produces 50% gray regardless the input color. Affects alpha. Gamma – Modifies the RGBA channel values exponentially. Gamma is a non-linear operation which does not change black (0%) and white (100%) while changing the other values. Higher gamma values produce darker mid-tones while lower gamma values produce brighter mid-tones. Affects alpha. Make Grayscale – R, G and B channels are set to average of those 3 channels, gives a gray-scale image. Invert – RGB channels are inverted around 50% resulting negative of the input image. Unmultiply the Alpha – If the source texture has alpha channel, RGB channel values are normally multiplied with the alpha channel value. For example, if a white pixel has 50% alpha, it's stored as %50 gray. This provides faster compositing operations since RGB values are already multiplied with alpha. Clamp – RGBA channels are clamped by the specified Clamp Min/Max values. The normal range of the parameters is [0..1] but it can still specify values out of this range to clamp HDRI images. Affects alpha. Clamp Min/Max – Controls Clamp. Normalize Clamped Input (0-1)– Available only when the Clamp is enabled. Clamps colors are scaled so that they map to [0..1] range again after the clamp operation. Affects alpha. |