
Try out LEGACY and see what you can instantly do with large FLATS. The key is it's easy to have this large contiguous custom floor with very little effort.
I've always wished that the 64x64 default scaling be undone for hi-res FLATs and have some way to control it via a control lump. ANIMDEFS will do. I never brought it up before because it entailed a lot of work. This is no longer true.
So far these extensions can't be just any ole patch though. They must be in the control sections Randy defined earlier. Technically, probably the only extra thing I would use is textures on floors which I think(?) will do what I want. The rest is already so easy to do I probably won't use because of the slowdown in editing when too many graphic resources are active - although the new restriction to external only resources helps a bit.
As far as backward compat, could add one more option, there's enough of those so why not 1 more, hehe.
There are lots of similar questions that crossed my mind that come up such as sprites tend to have odd widths.