I've been away for a few days and I see a lot is revealed in the past week, awesome work! Are there any sections left you'd like me to look into? Otherwise I could possibly run though them all once more to see if I can say anything about the unknown bits and pieces.


What you've found out about the MASK section is very interesting. Apparently, a single tile in the tileset could have a different mask in different levels. But even more interestingly, I'd expect there should have been some sort of tileset file back then, containing the clipping mask of all its tiles. MLLE would then copy the relevant ones, plus the complete tileset image, into the .lev files.