From: John Stone (johns_at_ks.uiuc.edu)
Date: Tue Jun 13 2006 - 11:16:03 CDT

Brian,
  Ah, yes, that material is now very out of date (thus the warning at the
top of the page). In particular, the "color change alpha" command no longer
exists, since that has been replaced by the use of materials in VMD.

Here's an example that does what you want:

material add Fade copy Transparent
mol modmaterial 0 0 Fade
for {set opacity 0} {$opacity < 1.0} {set opacity [expr $opacity + 0.02]} {
  material change opacity Material3 $opacity
  display update
}

  John Stone
  vmd_at_ks.uiuc.edu

On Mon, Jun 12, 2006 at 03:48:21PM -0700, Brian Bennion wrote:
>
> http://www.ks.uiuc.edu/Research/vmd/workshop/movie.html
>
> The surface image never fades away to show the tube in the 9pti example.
>
> Brian
>
>
> On Mon, 12 Jun 2006, John Stone wrote:
>
> >Brian,
> > Can you give me the URL for the example that didn't work?
> >It's easy to do, just define a new material, set your rep to use
> >the new material, and then change the transparency of the material....
> >If you do this in a script, you may have to call 'display update' to
> >force VMD to redraw if you're looping in a proc. In any case, if you
> >send me the URL of the script that isn't working for you I'll have a look,
> >fixing it if there's something amiss...
> >
> > John
> >
> >
> >On Mon, Jun 12, 2006 at 02:41:38PM -0700, Brian Bennion wrote:
> >>Hello,
> >>
> >>Does anyone have a good tcl script that can fade between different reps?
> >>One example script on the vmd workshop page doesn't work.
> >>
> >>Thanks for any help in this regard.
> >>
> >>Brian
> >>
> >>
> >>************************************************
> >> Brian Bennion, Ph.D.
> >> Biosciences Directorate
> >> Lawrence Livermore National Laboratory
> >> P.O. Box 808, L-448 bennion1_at_llnl.gov
> >> 7000 East Avenue phone: (925) 422-5722
> >> Livermore, CA 94550 fax: (925) 424-5513
> >>************************************************
> >
> >--
> >NIH Resource for Macromolecular Modeling and Bioinformatics
> >Beckman Institute for Advanced Science and Technology
> >University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> >Email: johns_at_ks.uiuc.edu Phone: 217-244-3349
> > WWW: http://www.ks.uiuc.edu/~johns/ Fax: 217-244-6078
> >
>
> ************************************************
> Brian Bennion, Ph.D.
> Biosciences Directorate
> Lawrence Livermore National Laboratory
> P.O. Box 808, L-448 bennion1_at_llnl.gov
> 7000 East Avenue phone: (925) 422-5722
> Livermore, CA 94550 fax: (925) 424-5513
> ************************************************

-- 
NIH Resource for Macromolecular Modeling and Bioinformatics
Beckman Institute for Advanced Science and Technology
University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
Email: johns_at_ks.uiuc.edu                 Phone: 217-244-3349
  WWW: http://www.ks.uiuc.edu/~johns/      Fax: 217-244-6078