So a little while back I added a little bit of ambient occlusion to Din's Champion. Ambient occlusion basically just makes places where light can't get to as well, like corners, darker. In this case, I wanted the ambient occlusion to make the foreground blocks stand out a little better from the background layer of blocks.

NOTE: these are cropped shots of a cave with no objects in them so it's easier to see the block layers.

With ambient occlusion (going with) - 800x434, 160KB

Without ambient occlusion (not going with) - 800x434, 164KB