This page provides information about the Spline Color Correction texture in V-Ray for SketchUp.
Overview
The Spline Color Correction texture is one of the three available Color Correction textures along with Color Correction and Bezier Color Correction. The Spline Curve texture allows remapping any other texture color values using RGB or HSV curve controls."
To color-correct a specific texture using a Spline curve, simply right-click on the texture slot to bring up its context menu select Wrap In and choose Bezier Curve. This will place the existing texture within a Spline Curve and then plug it in the original slot.
UI Paths
||V-Ray Asset Editor|| > Textures (right-click) > Spline Curve
||V-Ray Asset Editor|| > Create Asset (left-click) > Textures > Spline Curve
Parameters
Input – Specifies a color or texture to be curve corrected. When a texture is selected, it overrides the color as long as the texture checkbox is enabled.
Mode – Changes the set of curves used for color remapping. You can select between HSV or RGB mode.
HSV – Hue, Saturation and Value curves are used for remapping.
RGB – Red, Green and Blue curves are used for remapping the separate image channels.
Position – Controls the position of the selected curve control point.
Value – Controls the value of the selected curve control point. Values bigger than 1 can be used here if needed which does not affect the curve widget visually. It on the other hand has an effect in the rendered result and the texture Preview swatch.
Interpolation – Controls the interpolation type of the selected curve control point. Note that the interpolation type only affects the curve section between the selected point and the next one.
None – Disables the transition.
Linear – Values are linearly interpolated in RGB color space.
Smooth – Values are interpolated based on auto-generated horizontal tangents.
Spline – Values are interpolated based on auto-generated and auto-rotated tangents.
Curve Ranges
Input Min / Max – Determines the minimum and maximum color value of the input.
Output Min / Max – Determines the minimum and maximum color value of the result.
