Vector Brush

The Vector Paint brush is useful for editing vector maps and painting directional information onto your models. With the vector-specific paint blends, paint is converted to tangent space. The vectors are then represented as diffuse RGB values. This results in specifically-colored paint strokes that represent color-encoded vectors.

In addition to using the Vector Paint brush, the basic Paint brush can be used together with vector-specific paint blending modes to achieve different effects.

Viewing vectors is especially important for the creation of flow maps and normal maps. Flow maps can assist in
creating realistic textures or materials that simulate direction-specific patterns, such as feathers, scales, fur, hair, and water flow (to name a few). These have a pattern that tends toward a particular direction, or lie against another object in a particular manner, your textures should reflect this. Once you have identified how you want the effect to appear on your model, you can create flow maps that provide this information.

For example, in the image on the left, the feathers on the swan are determined to be following the curve of the neck. This impacts the feather pattern, so that the vectors in the texture curves around to display the natural flow pattern. In the image on the right, the vectors have been painted on the image to show how this flow pattern might appear.