I am building myself a ASE importer but I don’t know what all the thigns are under FACES. What does the A,B,C,AB,BC,CA things do and which ones do I need?

A, B and C give you the index of the vertices that make the faces. The array of vertices is given before in the file (don’t remember the name).

AB, BC and CA tell you wether the line should be visible or not: you can use it along with glEdgeFlag whem in wireframe mode.

Hope this helps.