Palettes and Remaps

OpenRA loads native ra/cnc palettes which are a list of 256 colors in a custom format (TODO: explain the color format).

Certain color indices have hard-coded meanings as transparent or shadow colors. Index 0 is mapped to transparent. Indices 1 and 3 are are light shadow color. Index 4 is a darker shadow.

Palettes are defined ingame by adding a trait to the World or Player actors.