I'd like to see multiple heightmaps supported. Expecially to the extent of features as bridges and other cool things like that in game. Potentially it could even be made possible to construct buildable bridges.
Like I said before, I looked into the code to figure out if I could work up a quick fix, but there are just too many ground calls in TAS code for me to use my original solution, which was to just paint a transparent master ground over the textured slave ground. It became pretty apparent that the engine needed to build two ground classes, and then figure out which one the units were on, but I couldn't figure out how to make the units align properly to the different grounds, let alone getting pathing to work properly for them. It's possible to do... that is to say 2 interactive heightmaps... it's just way beyond my current coding capability. If someone really competent were to rip through there they could probably get something rudimentary working pretty fast, but because of the pathing stuff it would take alot longer to iron out all the bugs it would introduce to the game.
Worth trying? I think so, it's one of the big features left to be implimented into the game. Can I do it? nope. Let me get through a couple more semesters of uni coding courses and I'll take another look
Until then it's either going to have to be ignored or someone else will have to try it. There is a few coders here I'm sure are up to the task, however most of them are busy as all hell already.