https://sourceforge.net/projects/batchsampler/
I wrote this little program to help everyone save some time when they're looking to create a grid of randomly sampled tiles from a source image. The idea is that if you have a whole lot of tiles, you don't want to spend all of that time doing a bunch of copy-pasting.
It is free to use for whatever purpose, and the source code is also available. I don't have a mac, so right now there is only a win32 version, but nothing is stopping you from porting it ![]()
PNG, TGA, and JPG are supported.
This image pretty much sums it up:
[Blocked Image: https://sourceforge.net/projects/batchsampler/screenshots/workflow.jpg]
...and with that workflow I made the following material in about 15 minutes this morning:
[Blocked Image: http://i.imgur.com/MUE0y.jpg]