VMD/Tachyon ambient occlusion lighting example scene
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A simple example of ambient occlusion lighting created by re-rendering
a VMD scene, adding command line lighting override flags to rescale
the direct lighting contributions and add ambient occlusion.

The VMD saved state will download the 1e79 structure from the PDB
and set it up in the way it's shown in these examples, so you can
compare how the original VMD image looked with how the final 
Tachyon renderings look.

Three example images are provided in the "images" subdirectory which
illustrate the differences between a standard VMD screenshot, a standard
Tachyon rendering of the exported VMD scene, and a Tachyon rendering
using ambient occlusion lighting.

Two example scripts are provided which render the image with Tachyon,
you may need to edit the location of the installed Tachyon/VMD directory
for your system:
  ./runme    -- render the image to a 24-bit color Targa file

  ./runmeHDR -- render the image using high-precision floating point
                color representation internally, renormalize the scene
                colors (rather than clamping) and save to a 48-bit color 
                Photoshop PSD file.

Enjoy,
  John Stone
  vmd@ks.uiuc.edu
