Make silhouette edges transparent for movie fades

[meng@…]

Begin forwarded message:

From: Elaine Meng <meng@…>
Subject: set framerate in ChimeraX?
Date: April 5, 2017 at 8:23:26 AM PDT
To: Tom Goddard <goddard@…>
Cc: meng Elaine <meng@…>

Hi Tom,
...
(2) Think I’ll need to use crossfade instead of transparency fade, because if there are silhouettes they don’t fade along with the model’s increasing transparency. That’s OK with me (this isn’t a request), just thought I’d mention it.
...
Elaine

[Elaine Meng]

An example is the feature-highlight kinase moreph movie, ligand faded in and out simultaneous with morphing (so I didn't want to use crossfade)
​http://www.rbvi.ucsf.edu/chimerax/features.html#morphing

[Tom Goddard]

I think this is too difficult and too infrequently used to implement. Others have mentioned it when making Chimera 1 movies, and I'm not saying it is not useful.