• Adobe After Effects

  Is there a way to setup AE so it always interprets the alpha of dpx rendered frames as straight ?

  Posted by Elliott Kajdan on April 20, 2012 at 12:03 pm

  Hello people !

  Im working on 3D intensive projects for TV, and all the renders I get from 3Dsmax (Vray) are in DPX and my project workspace is linearized.
  Those DPX are rendered non-premultiplied so that I can avoid having edges when I recompose my beauty out of the dozen of Vray elements.

  Problem is, each time I update the passes with newer renders, the alpha interpretation goes back to premult !! Im wasting hours just to reset the interpretation to straight 🙁

  Does someone know if there is a way to force AE to interpret the alpha of any given footage to straight ??

  Thanks folks

  E.

  Elliott Kajdan replied 14 years, 5 months ago 2 Members · 2 Replies
• 2 Replies

• 

  John Cuevas

  April 20, 2012 at 4:37 pm

  In this thread, near the bottom Walter Soyka discusses how to change AE’s interpretation by editing the interpretation doc:

  https://forums.creativecow.net/thread/2/992161#992188

  Johnny Cuevas, Editor
  Thinkck.com

  “I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
  —THOMAS EDISON on inventing the light bulb.
• 

  Elliott Kajdan

  April 20, 2012 at 5:05 pm

  Thank you very much John

  I found the line that was causing me such a trouble :

  # OpenEXR is premultiplied by convention
*, *, *, "oEXR", * ~ *, *, *, P, *, *

  I changed it to

  # OpenEXR is straight by convention
*, *, *, "oEXR", * ~ *, *, *, S, *, *

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