So today I was building a second floor and I couldn't really tell where I built floor and where I hadn't built floor. There is a little shading difference between the tiles on the active floor, and the floor below. This is a suggestion to make the tiles on the floor below a little darker so you know where there are/aren't floor tiles. http://i.imgur.com/DJU4GIy.png This picture is a bad example because I have build over all the hard to tell tiles. I feel as though it is good enough to get my point across.