This is just a quick suggestion to a great program. It would be cool if you could instantly apply the material changes to your 3D view when changing materials. For example, suppose you want to change the floor but you want to select through a bunch of different colors/styles. If there was an 'Apply' button, you could instantly see the new material/color on your design instead of closing the material chooser and clicking 'done'. Just an idea. By the way, this app is incredible.