GL Galore offers some additional functions that are not part of the official OpenGL API. These functions allow you to conveniently use Hollywood objects like brushes with OpenGL. For example, the gl.TexImageFromBrush() function allows you to upload a Hollywood brush as an OpenGL texture and the gl.GetTexImageToBrush() functions allows you to convert an OpenGL texture back into a Hollywood brush.
See the chapter "Hollywood bridge" for all available functions.