Original Post
I'd like to use pixel shaders for the next 2d game I'm working on, using SFML's GLSL support. I'm looking to get some ideas for interesting effects to overlay on top of pixel art (no 3d rendering from a 2d perspective or anything). There are some nice fullscreen post processing effects in this Facewound shader tutorial, e.g. color saturation, black and white, embossed, etc. Besides fullscreen effects, we can also apply shaders to arbitrary textures like the current player sprite or whatever, so there's definitely more room for creative use. Ideas/examples of what sort of effects you've seen can be done would be appreciated.