Joey's blur effect... sounds cool... I'm famous *gg*.

The problem with this technique is that you have to blur the sprite's bitmap with gaussian blur or a similar technique. Otherwise you'll see edges and blurry pixels like in the sample above (not that that'd be bad - I find it's great!).

If you invert the bitmap (without blurring it), you can adjust the level's contrast (by changing the alpha value).

If you invert and blur the bitmap, and then subtract it from the view, you get a dark-dream-like effect (as if you were dreaming of a dungeon).

If you blur the bitmap in direction of the camera movement and add it to the view you get a great motion-blur effect.

Many static image filters work with adding/subtracting/mixing (anyhow)manipulated copies to the pictures. I think that there can be taken out a lot for programming shaders.

JOEY.