Table of Contents

This page provides information on the V-Ray Curvature Texture.

 

Overview


Curvature is a texture that effectively samples the underlying mesh for curves. A region around each shaded point gets sampled with additional rays (similar to Dirt) and all additional normals are averaged to get a "smooth" normal at the original point. This normal is used to compute the color. The color at each shaded point is a greyscale value: darker values are dents (or holes), lighter values are peaks. The parameters should be adjusted by trial and error since they generally depend on the scale used, hence the defaults might not be appropriate at all in some cases.

Any texture can be replaced via the Replace With New Texture () button, which activates when you select the texture to be replaced. If the texture is an instance, all copies are changed as well.

 

 

 

UI Paths


||V-Ray Asset Editor|| > Textures (right-click) > Curvature 

||V-Ray Asset Editor|| > Create Asset (left-click) > Textures Curvature 

 

 

Parameters


Mode – Switch between respective modes.

Legacy – Does not distinguish if the mesh is curving outward (convex) or inward (concave) but instead takes into account only the amount of overall curvature
Convex – Generates a grayscale based on the mesh's outward curve.
Concave – Generates a grayscale based on the mesh's inward curve.
Both – Generates a red-green gradient based on both the mesh's convex and concave. Red corresponds to the mesh's convex and green corresponds to the mesh's concave.

Sample Spread – Specifies the radius of the sampled region. If a texture is selected, it overrides the color as long as the texture checkbox is enabled.

Radius – Factor determining the radius that the curvature traces. Can be used to match curvature between big and small objects.

Threshold – Curvature values below this threshold are ignored and are shown as pure black. This focuses the curvature effect only around the most curved areas of the mesh.

Ignore Bump – When enabled, excludes Bump maps from VRayCurvature computations. 

 

 


 

Min Output Color – Specifies the minimum output color value for the most concave area (the dents in the mesh). Default value is 0 - completely black.

Max Output Color – Specifies the maximum output color value for the most convex area (the peaks in the mesh). Default value is 1 - white.

Output Gain – Multiplies the output values.

Output Lift – Uniformly lightens the output values.

Output Gamma – Applies gamma correction to the output values.

Output Pivot – Pivots the value to the gamma correction (output values equal to the pivot value are left unchanged).

Output ClampWhen enabled clamps the Output min color and Output max color values in [0,1] range (negative values are output as 0 and values above 1 are being output as 1).