@BS750: The RA2/YR terrains lack some of the ramp tiles TS had, so while I'm not 100% sure, there's the possibility that these missing pieces need to be recreated to prevent graphical glitches.
Also, the engine supports only 8 height levels or so. The RA2/YR maps weren't made with deformable terrain in mind, so a lot of them is probably on height level 0 so it can't be lowered any more.
Also, the engine supports only 8 height levels or so. The RA2/YR maps weren't made with deformable terrain in mind, so a lot of them is probably on height level 0 so it can't be lowered any more.