Attached Link: http://www.wolfiesden.com/bryce/tut/old/adv-lighting3.html

Since all the talk lately is of lighting in scenes and such I thought I'd do some testing. Wolfie's Den at the link above did a tutorial on lighting in the real world. I decided to replicate these and do some comparisons to real lighting. The first picture is a single radial light, all light calculations are done from a single pinpoint. As far as I know there are no natural or manmade lights sources that only emit light from essentially a point the size of an atom. Notice the hard crisp shadow. This took 33 seconds on a 1.67 Ghz AMD (works like a 2.0 Ghz).