The Curvature Texture node can be used to alter the look of the edges of a surface (figure 2).

Figure 1: Curvature texture Node


Figure 2: The Curvature Texture node is used to mix Red and Blue Floats to Color nodes on a Diffuse material

Parameters

    • Mode - Determines the type of curvature to sample.
    • Strength - Determines the overall strength of the curvature effect.
    • Radius - Specifies the maximum area affects by the curvature effect.
    • Radius Map- Determines the proportion of the maximum area affected by the curvature effect.
    • Offset - Specifies the offset from the surface used to sample the neighboring geometry.
    • Tolerance - Determines the tolerance for small curvature and small angles between polygons
    • Spread - Controls the ray direction with respect to the normal of the surface where 0 means the curvature is sampled straight in the direction of the surface normal, and 1 means the sampling rays are shot perpendicular to the surface normal.
    • Include Object Mode - Determines which objects should be included in calculating the curvature value.
    • Invert Normal - Inverts the normal direction when calculating the curvature value.