• Adobe After Effects

  motion blur spill removal problems

  Posted by Jesse Richards on September 15, 2006 at 10:54 am

  i am having some problems removing the spill from motion blur on my footage using keylight. if i have the view mode set to final result, the inbuilt spill suppressor works but causes grain in the main portion of the person, however if i have the view set to intermediate and use AE’s spill suppressor it doesn’t solve the motion blur’s spill. any ideas?

  Pierre Jasmin replied 19 years, 8 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Erik Pontius

  September 15, 2006 at 5:48 pm

  The “views” in Keylight are just for looking at the various elements such as your matte, what areas are being color replaced, etc… They can help fine tune your key.
  The “grain” you’re seeing is probably keylight doing spill removal and replacing it will a color. The spill suppression can be tweaked and you can choose a different color for Keylight to replace the spill with.
  The status view is really helpful for showing your matte and which areas are transparent, opaque and semi-transparent as well as any areas that have been changed (clipped, softened, etc…) by Keylight. You’re going to what to try to tweak the options under screen matte as well as experimenting with choosing different areas of your green screen (lighter or darker pixels) to see if you can get better results.
  I once had to key a hundred or so short clips shot with the same subject (an actor sitting on a box) with a poor greenscreen behind him. It took a lot of experimentation in keylight to find the right blend. I then made a preset out of these settings, and used it as a starting point for all the clips.
  If you haven’t done so yet, check out Andrew Kramer’s tutorial on Keylight (his DVD is excellent as well)
  https://forums.creativecow.net/cgi-bin/page_wrapper.cgi?forumid=2&page=https://www.creativecow.net/articles/kramer_andrew/colorkey/index.html

  and Aharon’s on supertight junk mattes (which has saved my butt a few times)
  https://forums.creativecow.net/cgi-bin/page_wrapper.cgi?forumid=2&page=https://www.creativecow.net/articles/rabinowitz_aharon/junk_mattes/index.html

  Erik
• 

  Pierre Jasmin

  September 15, 2006 at 6:07 pm

  You can try our RSMB with a negative amount
  Works ok on green screen to remove some MB

  Pierre
  http://www.revisionfx.com

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