These are fun! Shameless: http://www.dormando.me/post/fpga-raycaster/ http://www.dormando.me/post/fpga-raycaster/ - I did one of these last year with an arduin

These are fun! Shameless: http://www.dormando.me/post/fpga-raycaster/ http://www.dormando.me/post/fpga-raycaster/ - I did one of these last year with an arduino using an FPGA as a weird GPU :)