Here you will find information, gathered from various places, about map compiling errors.

Usually the build sequence, which result in a final .BSP file from a .MAP file, are split into phases;

1. BSP - take the .MAP textfile and calculate a fullbright, non-optimized .BSP file.
2. VIS - optimizes the .BSP file, so the game's graphics-engine does not have to draw everything.
3. RAD - calculate (colored-)lights in the .BSP file, using information from the BSP and VIS phases.

However, not all QuArK supported games use the same build phases. Some might contain more or fewer phases, and maybe also in a different sequence.

If you have any questions, problems or find solutions regarding these topics, please post them in the QuArK forum/mailing-list.