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•FAQ• Maxwell Alpha in After Effects
Posted: Thu Jul 10, 2008 12:09 pm
by gotoxy av-media
hello!
TOMs Maxwell Alpha Photoshop Action works fine for single frames! thanks!
but how to use it for a rendered animation sequence?
any hints to get this automated by photoshop or
have i to do this action frame by frame???
any ideas?
Posted: Thu Jul 10, 2008 12:34 pm
by fuso
Hi ya,
I suggest using video editing software like Adobe 'After Effects' or
Adobe 'Premiere' where you can load the alpha channel footage
seperately in order to clip your colour channel. I think even QuickTime Pro
is capable of that. To do this in Photoshop is probably quite time consuming.
Hope that helps
Posted: Thu Jul 10, 2008 1:04 pm
by Fernando Tella
Maybe you can do it in Photoshop playing a bit with File>Automate>Batch.
You can make Photoshop open files from folder and apply an action automatically.
But probably a video editing soft will handle it better.
Posted: Thu Jul 10, 2008 1:13 pm
by gotoxy av-media
hi fuso,
thank you for the quick answer!
but how to get rid of the premultiplied alpha edges with AFX?
Posted: Thu Jul 10, 2008 1:19 pm
by gotoxy av-media
hi fernando,
that was my first idea, but i was not able to manage this script in PS,
so that is why i am asking here, if someone already has done this batch-task!
hmmm?!?
Posted: Thu Jul 10, 2008 2:32 pm
by fuso
gotoxy av-media wrote:hi fuso,
thank you for the quick answer!
but how to get rid of the premultiplied alpha edges with AFX?
As far as I remember there is a setting when you load the footage, if and
how to premultiply the alpha... Haven't used it for ages
Posted: Thu Jul 10, 2008 3:47 pm
by gotoxy av-media
i am not a AFX-pro, but as far as i know, you can only choose the premultiplied color option if you got an image(seq) with an embedded alpha channel (RGBA)...
maxwell produces seperate files: rgb and alpha, so i made a set up build of two layers with these two sequences in AFX and make use of alpha or luma matte...this is not working very well because of these dark alpha edges...
and i havent found the premultiply option yet...
so how can i achieve the same result as in photoshop with toms script or RGBA files in AFX???
Posted: Thu Jul 10, 2008 4:57 pm
by tom
Here you go!
Posted: Thu Jul 10, 2008 6:07 pm
by Fernando Tella
Here comes the rescue teaaaaaaaam!
Posted: Fri Jul 11, 2008 11:39 am
by gotoxy av-media
thank you TOM!
this is exactly, i was looking for!!!
thats a real time-saver for me
Posted: Fri Jul 11, 2008 12:56 pm
by tom
Posted: Fri Jul 11, 2008 4:01 pm
by def4d
Thanks Rescue Tom!
Could you take that thread to the tuto section?
