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Final render result distorted

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Phil BroughFinal render result distorted
by on Feb 1, 2010 at 10:13:29 pm

Hi there I am rendering a 50 frame sequence 1920 HD. When I ram preview this is looks clean and fine but when I render it and watch it back the images come out distorted like they have a weird ripple effect going through them. Anyone have any ideas why this might be happening?


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steven savalleRe: Final render result distorted
by on Feb 1, 2010 at 10:46:17 pm

What compression are you rendering them in?


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Dave LaRondeRe: Final render result distorted
by on Feb 1, 2010 at 10:52:36 pm

[Phil Brough] "Anyone have any ideas why this might be happening?"

Yes -- your computer doesn't like you. Not one bit. What did you do to make it so angry?



Seriously, we don't have anywhere near the information necessary to make a diagnosis. Platform-processors-operating system-amount of RAM-Open GL on/off-codec of footage-codec being rendered to.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Phil BroughRe: Final render result distorted
by on Feb 1, 2010 at 11:07:25 pm

haha, whoops. Right here goes. I am using a PC Intel Core 2 Quad Q9540 2.66 GHZ.
I have 4 Gb of ram and am running Windows Vista Ultimate 64bit.
Graphics card is Nvidia Geforce 8800 GT.
I am working from a bunch of iff image sequences rendered out of Maya. I am rendering out animation codec QT movies but also tried an image sequence and the same distortion effect occurred. I have enabled disc cache with a maximum disc cache size of 2000 mb. I am unsure about open GL although I do have that switched off in the preview settings in After effects.


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Dave LaRondeRe: Final render result distorted
by on Feb 1, 2010 at 11:38:37 pm

[Phil Brough] "I am unsure about open GL..."

Double-check that it is OFF when rendering. It's a great thing for many applications, but Open GL often does more harm than good in AE.

And since you don't have a lot of RAM -- 4GB isn't much in AE-Land -- disable multiprocessing if it's on.

Those two issues are very common causes of AE woes. If they don't help, it's back to more diagnosis.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Phil BroughRe: Final render result distorted
by on Feb 2, 2010 at 2:53:51 am

How embarrassing, I found the problem. I had turned on frame blending and motion blur on some layers but then turned it on in the comp. So it was previewing without it but rendering with it.


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Dave LaRondeRe: Final render result distorted
by on Feb 2, 2010 at 4:02:42 pm

Glad it was just one of those Homer Simpson "Doh!" moments. Otherwise, it would have taken an involved diagnosis to come to a simple solution.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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