Fresnel Metal

It's always depressing to me when I hear birds chirping before I go to bed.  Tonight is, unfortunately, one of those nights.  But for my troubles I have been rewarded!

I finally implemented a Fresnel-like term in the tracer.  I really want to get a nice metallic look for the spaceship (I mean, that's pretty much an essential!).  To that end, I implemented a metallic Fresnel approximation from this paper: http://sirkan.iit.bme.hu/~szirmay/fresnel.pdf.  It actually looks really nice!

My ship is finally starting to remind me of those first few renders that I did in PBRT ages ago.  Yay, that means I'm getting close to PBRT's quality!

Except for those horrendous black edges.  Don't mind those.  I'll have to look into it...I'm sure they're just bad mesh normals.  Rawr.