That's because it would crawl if it did, it doesn't need the clipping model provided by QuickDraw.On the other hand, I've run Marathon on it with MacsBug recording A-Traps, and I really don't see to many QuickDraw calls. Like, instead of calling things like _DrawRect or RgnRect or _Line, Bungie just wrote their own code to do this.Grrr.
QuickDraw implements a 2d graphics model, Marathon was rather 3d.