Yeah, I was wondering about that myself. They are single pixels in the 64x64 but when you drag a body I lay them down so fast that they stack up pretty quickly and make it look like it's using subpixels because they aren't placed at like (10,10) but instead like (10.25, 10.25). I figured it was probably ok because my character doesn't move from pixel coord to pixel coord either, he just scoots along. ;)