V-Ray Toon Overview
VRayToon is a very simple node that produces cartoon-style outlines on objects in the scene. To create a VRayToon node go to Pass Shaders->Volume->Add ->VRayToon.
VRayToon Parameters
Line color - this is the color of the outlines
Width Type - specifies weather the width of the lines will be measured in Pixels or in World units
Line Width - specifies the width of the outlines. If a texture is connected it is multiplied by the value specified in the field.
Opacity - opacity of the outlines.
Hide Inner Edges - determines whether lines will be created for parts of the same object with varying surface normals (for example, at the inside edges of a box)
Normal threshold - this determines when lines will be created for parts of the same object with varying surface normals (for example, at the inside edges of a box). A value of 0.0 means that only 90 degrees or larger angles will generate internal lines. Higher values mean that more smooth normals can also generate an edge. Don't set this value to pure 1.0 as this will fill curved objects completely.
Overlap threshold - this determines when outlines will be created for overlapping parts of one and the same object. Lower values will reduce the internal overlapping lines, while higher values will produce more overlap lines. Don't set this value to pure 1.0 as this will fill curved objects completely.
Trace bias - this parameter depends on the scale of your scene, it determines the ray bias when the outlines are traced in reflections/refractions.
Secondary rays - this will cause the outlines to appear in reflections/refractions as well. Note that this may increase render times.
Include/Exclude Objects
This list allows you to specify which objects in the scene are going to be affected by the VRayToon effect.