Okay, it’s like I’m working my way laboriously through an Open GL tutorial right now. I just want to get the way I’m going to interact with Open GL down pat, then I can finish deserialising objects and I should have areas rendering — without a depth buffer this time, better to match the original — within another hour or so of work.
Switching back to trying to get a full .KIT/.RUN decode. It looks like the thing I thought was a category is actually the object flags. So I don’t know what the thing I thought was the flags is. Also Object now stipulates how many additional vertices to collect.