A MAPR asset assigns surfaces to certain parts of the JSP mesh, allowing material effects and surface effects (such as out of bounds) on the level model.

MAPR
Surface Mapper
TypeBinary
Games usedNight of 100 Frights

Battle for Bikini Bottom
The SpongeBob SquarePants Movie
The Incredibles

Rise of the Underminer
Source codezSurface.h

Format

The asset data starts with the asset ID, then an int which defines the amount of entries in the MAPR table, then the entries themselves. Each entry has the following format:

Offset Type Description
0x00 AssetID (Surface) Surface to be applied
0x04 int Unknown - this is likely an index into the JSP to choose which mesh the effect will be applied to.