Hi Folks, I'm a 1 week old user with loads of issues I can't sort thru. I am a paper and pencil architect that is trying this out. I like it so far and have been able to get to this point and now I am stuck. I need help with terrain sticking to foundation walls, missing and disappearing terrain under the house, wall surfaces incomplete, Trouble with missing 3d parts... I have looked thru support docs, knowledge base, HD Help. I am sure its user error but I can't sort out how to fix.