One way to get more realistic lighting is, of course, radiosity (but
expect problems using it). For some hints:
http://www.students.tut.fi/~warp/pics/Radiosity_test2/
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
