# this command makes a POV-Ray 3 script and then renders it with povray, with the following settings:
# use the same aspect ratio as the screen (+W%w and +H%h)
# write targa file (+FT) with filename + ".tga" (-O%s.tga)
# make background transparent (+UA)
# use anti-aliasing (+A)
# make it so that you can kill povray during rendering (+X)
render POV3 vmdscene.pov povray +W%w +H%h -I%s -O%s.tga +X +A +FT +UA