Ray casting corrected

I'm still pretty sure I'm fudging a lot of things I'm not supposed to fudge, but at least it looks the way it's supposed to now.


And because I'm not too fond of that look, the wrong version and the right version comped together:


Theoretically that would be calculating the color values based on both angle from light source and distance from light source, but something tells me that's not the whole story and that this is the wrong way to do it. Oh well.