Infiltrate Exploit Spread: Lighting Tests

    I added a narea light to hover over the red blood cell. Each shaft (left-to-right) is done with the following parameters:

1. gamma = 0.2    intensity = 0.1
2. gamma = 0.2    intensity = 0.15
3. gamma = 0.2    intensity = 0.2
4. gamma = 0.05  intensity = 0.2
5. gamma = 0.1    intensity = 0.2

I have a personal preference for 3. Lowering the gamma appears to  make the shadows less definitive, so I'll keep the gamma relitively reasonable.