Several times on Planetside forums I read comments from the developers of TG2 in which they stated that they strived to get realistic results, but not necessarily by means of physically correct rendering models. I think that a I-look-right-even-tough-math-and-physics-are-wrong lighting/atmosphere model  could be a useful addition to Vue armoury.

W.r.t. to realistics clouds, professional renders use smoke and clouds simulations by means of particle systems. E.g. the nuke mushroom cloud you saw in the sixth season of '24' is the result of the work of two (costly) plugins... and even then, if you compare that sequence with actual nuke footage, you see that the GC rendering is really simplicistic.

Bye!!!

...anyway, we are less than a fortnight from SIGGRAPH...

GIMP 2.7.4, Inkscape 0.48, Genetica 3.6 Basic, FilterForge 3 Professional, Blender 2.61, SketchUp 8, PoserPro 2012, Vue 10 Infinite, World Machine 2.3, GeoControl 2