SM3 Map Format
From Spring
Introduction
As opposed to the original SMF renderer, the SM3 map renderer allows multiple texture layers rendered on the terrain. This allows for higher texture resolutions and (eventually) improved lighting such as bumpmapping/specular mapping.
Map specification
Instead of a binary SMF file and a SMD file, all map information is now stored in a text based .SM3 file. This has the same basic layout as the original .SMD file, but it includes a [TERRAIN] section:
