A comprehensive study of the outstanding code example from 1993 - the martian landscape renderer by Tim J. Clarke.
Original code has been disassembled, rewritten and reduced from 5649 bytes to... 1517 bytes! :)
Tim, if you read this, please contact me! I was trying to reach you, but I couldn't...
It works on DOSBOX and also on genuine x86 machines (mouse is needed). More details can be found here.