Mosaic filter might be a start to get what you want
(
sepang 's favourite day is,
Wed 29 Jul 2009, 23:09,
archived)
I've tried that
but it gives half/half pixels on boundaries, so around the edges of an image for example, it make it part transparent. I want it to have solid blocks all the way round so I can make high res look like low res
(
gtfomh,
Wed 29 Jul 2009, 23:12,
archived)