Suggestion
Let underground belts in your cursor check ghost terrain when checking for entrance/exit pairing.The Problem
While planning a space platform, after placing an underground belt entrance, the underground belt in your cursor will remain an entrance. You will have to reverse the direction of every exit you place to make them actually be an exit. This is inconsistent with how planning underground belt layouts (almost) anywhere else behaves, and it's annoying.Technically this would happen while planning on hot lava with foundation, too, but who does that? =p