Lux just simulates pseudo-volumetric lighting. Not sure what you hope to achieve with it on ordinary footage. Rather you would have to somehow transform your footage and re-light it similar to 3D rendered footage. That can be done with tools like Trapcodfe Form or the PixelCloud plug-in from AE Scripts to turn it into a point cloud with dispalcment structure or using RevisionFX' Shade/ Shape to extract a normal map and then treat it with tools liek Normality or ZBornToy. Likewise, displacement techniques can be achieved with Freeform/ FreeForm Pro. and, well, of course you may be able to improve your webcam software with a bit of masking, Rotobrush and selective adjustments, too.
Lux just simulates pseudo-volumetric lighting.
yeah, that all dawned on me several hours after i posted that. i got to thinking and i finally remembered why i had used it, and it was to add a different shade of light on a band member with a live shot, which it came out fine, but not what i am trying to achieve. i may just have to breakdown and buy a desk lamp and figure out where the heck to put it. not much available real estate i may try some of the recomendations.... but probably the best look would just to be to add more light to begin with.
It's always to best to fix problems at the source, and in your case, it's the lighting you're using for the webcam. You'll be a lot happier if you bite the bullet and do what you nned to do.