Ok, this is the idea:

http://www.youtube.com/watch?v=YOh7fcrVMSE

I maybe don't want to use 15000 pins, but the idea is there.

I have a picture and have reduced the size down to "SMALL!" size but it still has too many colours.

I tried to reduce the colour depth to 4 colours but that made a mess of the picture with the dithering and that stuff.

I have seen it done with LEGO as well at a show I went to recently.

Anyone every done it and could help me work out how to get it working?