• Adobe After Effects

  ROTO BRUSH Distortion Bug

  Posted by Paul Whishaw on July 13, 2011 at 8:22 pm

  I have used the Roto Brush tool on a particular scene and for the most part it is excellent. There is one frame however that is messed up and I cannot seem to find the cause. There is a section of the frame that I am working with that gets mirrored and smear across the frame. I’m including a link but can’t show the whole frame for copyright reasons.

  https://i263.photobucket.com/albums/ii140/Bentleysuper8/Screenshot2011-07-13at121820PM.png

  Hopefully you can get enough info from the shot to see what is happening. Anyone see anything like this before?

  Rob Neal replied 14 years, 9 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Declan Smith

  July 13, 2011 at 10:04 pm

  I had the same problem and found that for me, it seemed to relate to interlaced footage / rendering out to interlaced. I changed renders to be non interlaced and if seems to have fixed it for me.

  Declan Smith
  https://www.madpanic.tv
  FCS3 / After Effects CS5 / Combustion / Canon 7D / Canon XL2
• 

  Paul Whishaw

  July 13, 2011 at 11:28 pm

  I don’t think interlacing could be the problem as I’m working with Pro Res footage. This happens right in the composition as well, before I export anything.

  It has something to do with the Decontaminate Edge setting. While on I get the smeared mirror and when off it is clean (but edges look bad).

  Paul Whishaw
  PDVpro.com
  “If it moves, We’ll Shoot it”
• 

  Rob Neal

  July 28, 2011 at 9:11 am

  I agree. I am using TIFF plates and getting the same problem. Fiddling with the decontamination settings can sometimes help.

  http://www.robneal.co.uk

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