Does Windows 7 mess with your small tiled background wallpaper?

Question

I have a little pixel-perfect pattern image that I made. It's a 32x32 PNG image intended as a tiled desktop background / wallpaper. I use it on my Mac OS X and Windows Vista installs.

When I use it in Windows 7 as a tiled background, it looks messed up. It's no longer pixel-perfect and looks like it has some kind of filtering or moiré effect going on.

What's happening here?

Answer 1

It probably doesn't 'cut off' extra tiles on the border but rounds count of tiles to screen width/height and then scales it to real screen size.

Creating an image with size of your screen and tiling it in any graphical editor will surely work anyway.