Free Hero Mesh class resource file
A Free Hero Mesh puzzle set consists of four files; this article is about the .xclass file, which contains pictures and sounds.
This file is a Hamster archive which contains lumps with extension .IMG and .DEP and .WAV.
The .IMG lumps are pictures, using a specialized compression format. Each such lump can store multiple versions of the picture at different sizes (which must be square, but otherwise can be arbitrary), and use a fixed palette of 255 colours plus transparency.
The .DEP lumps reference .IMG lumps and produce a picture made by modifying and/or combining the pictures in the .IMG lumps.
The .WAV lumps are WAVE audio files.
The PICEDIT.CFG lump contains configuration data for the picture editor. It can safely be deleted (the picture editor will still work even if this is deleted).