Its going in-game, but if you use the turn tool you can see the hiden edges, so wont they stay the same even when you convert it to a .gbxmodel? Or would I need to add all of the edges? I like to model that way because its got a cleaner look to it, but I see what you mean and I agree with you. I might start to model with actualy triangles instead of 5 or more sided faces.