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[Shadowth117]

Pillowy refers to pillow shading. Pillow shading is a type of shading most people dislike and try to avoid due to its light source appearing to come from in front of it. While this isn't so bad in 3D stuff, it looks really bad for sprites especially since people who use it tend make it into a gradient and end up having an extremely dark area and an extremely bright area on the sprite very close together. The effect isn't too pleasing to look at usually. While there are times when it is acceptable, this is not one of them.

In the future, try to avoid pillow shading and add more anti-aliasing to your sprites so they don't look quite so blocky.