How do you make the camera in blender cycles render everything so it looks like pixels? I want everything in my scene to look pixelly like this image I found:
Found a solution in compositing based on this BlenderArtists thread.
To pixelate a render layer or image, you simply need to use the distort scale node to scale it down, use the pixelate filter node, then scale it back up.
The amount of scaling up and down control the amount of pixelation.
EDITED: If you really want to reproduce the effect from the original image, with the pixelated outline as well, you need a slightly more complicated node setup: