In Antwort auf:

I think your first question has to do with the engine not doing depth tests for alpha enabled polies. I believe it can be fixed with an effect script (not a shader per se), that does a ZEnable=true (but i think there is another instruction that is needed as well)




The "ZENABLE=true" value is fixing the problem with alpha enabled polies but there is also a new problem. Some polies behind other polies aren't visible, also with "CULLMODE=none".