From: Bjoern Olausson (
Date: Thu Jun 11 2009 - 06:09:15 CDT

On Wednesday 10 June 2009 17:57:58 John Stone wrote:
> Not currently. The rendering code in VMD can actually do this,
> but it is (presently) always given full intensity white light colors
> (1.0, 1.0, 1.0). This is something I could likely add in the next version
> of VMD without much difficulty. With features like this, far more work
> goes into adding new GUI controls and text commands than into writing
> the low level code that does the rendering.
Sounds good. Now there is only the GUI missing for the intensity ;-)

> Another feature I hope to add in the next version of VMD is support
> for user-defined lights that can have more sophisticated functionality,
> such as distance-based attenuation, spotlights, etc. With that, users
> can write scripts that have lights follow an atom selection, or shine
> on a particular region of interest, etc.
Very interesting. Looks as if I should learn some TCL

> This can be done now using
> Tachyon and a little Tcl script I've written if you'd like to play
> with this sort of thing.
> John Stone

Why not, point me to the script (and if you have, a good TCL documentation)

I am looking forward to the next VMD version :-)