Mapping:What is a brush

This page is a stub! Please help us improve it.

A brush is a convex volume.

This volume is always bound by four or more planes, each plane forming one face of the brush.

Each brush face has a set of texture, surface and content properties.

Texture properties are a small number of values defining: Shader name, XYZ scale/stretch values, rotation.

These values are stored along with each face in the mapname.map file.

Surface and content properties are stored in an external shader file. However, some content properties may still be stored along with the surface properties in the mapname.map file, one example being detail.