RE: [PyMOL] load_png doesn't support alpha (transparency)?

[Warren D. <wa...@de...>]

Peter,

PyMOL does read the alpha, but it doesn't support compositition with the
software at present, so there is no practical use for this capability.

set show_alpha_checker
load transparent.png

Will demonstrate that the alpha is read by adding a checker pattern to
the background.  It sounds, you'd like it superimposed over the existing
scene for purposes of alignment. =20

Thanks for the suggestion!

Cheers,
Warren

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> -----Original Message-----
> From: pym...@li...=20
> [mailto:pym...@li...] On Behalf Of=20
> Peter Adrian Meyer
> Sent: Wednesday, February 22, 2006 7:43 AM
> To: pym...@li...
> Subject: [PyMOL] load_png doesn't support alpha (transparency)?
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> Hi all,
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> I noticed today that when reading a png file using load_png,=20
> the alpha channel does not appear to be respected (regions of=20
> the png that should be transparent are not transparent but=20
> show up as white).
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> Does anyone know if this by design, a bug, or something I'm=20
> doing incorrectly setting my alpha channel in the png file?
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> If you're wondering why I'm trying to do this; I'm attempting=20
> to generate two aligned figures from models that are in=20
> crystallographic origins.  The end goal is to have maps in=20
> each of these figures also aligned for comparison, so I can't=20
> just transform the models to get them aligned (use of the=20
> align command is out for similar reasons; unless there's a=20
> way to get the transformation matrix generated by model=20
> alignment and apply it to a map that I'm not aware of).
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> Thanks,
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> Pete
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> Pete Meyer
> Fu Lab
> BMCB grad student
> Cornell University
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