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Motion blur problem at 16 bpc

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Engin OsmanovskiMotion blur problem at 16 bpc
by on Oct 9, 2014 at 2:22:14 pm

Hi... I am trying to give motion blur to a logo that is being shattered. Since the composition's motion blur and also Realsmart Motion Blur effect didn't work (i don't know why), i am using CC Force Motion Blur effect for this. The problem is that when the project is set to 8bpc everything looks fine, but once i switch to 16bpc, somehow the motion blur gets crazy. It looks like the particles are duplicated and messy rather than motion blurred. (It is hard to describe. Please check out the screenshots below). At 32 bpc it is even worse. Why is this happening? All i need is a little bit of motion blur in a 16bpc project. What am i doing wrong?






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Jonathan KlingenfusRe: Motion blur problem at 16 bpc
by on Oct 9, 2014 at 3:07:29 pm
Last Edited By Jonathan Klingenfus on Oct 9, 2014 at 3:10:02 pm

This may sound dumb have you tried to pre-comp the shatter effected object then apply the motion blur to the pre-comp? Also what Af are you working in? Also Shatter is an 8 bit plugin. It matters on the order you place the effects.

Jonathan Klingenfus- Louisville Kentucky
http://www.jkmediadesign.com


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Engin OsmanovskiRe: Motion blur problem at 16 bpc
by on Oct 9, 2014 at 3:46:03 pm
Last Edited By Engin Osmanovski on Oct 9, 2014 at 3:48:39 pm

Yes, i tried precomposing, Jonathan. I think, if it was about precomposing, it wouldn't have work fine with 8bpc either. But it does. (I tried it on an adjustment layer too. It didn't help.)

In this case i definitely want motion blur after the shatter effect. Otherwise the result is undesirable.

What do you mean by "Af"?


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Jonathan KlingenfusRe: Motion blur problem at 16 bpc
by on Oct 9, 2014 at 3:50:05 pm

Sorry AE.

Jonathan Klingenfus- Louisville Kentucky
http://www.jkmediadesign.com


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Engin OsmanovskiRe: Motion blur problem at 16 bpc
by on Oct 9, 2014 at 4:08:18 pm

Ah ok. I am working in CS6.


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Kevin CampRe: Motion blur problem at 16 bpc
by on Oct 9, 2014 at 5:31:10 pm

have you tried putting force motion blur on an adjustment layer above the shatter layer?

Kevin Camp
Art Director
KCPQ, KZJO & KRCW


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Engin OsmanovskiRe: Motion blur problem at 16 bpc
by on Oct 9, 2014 at 6:41:52 pm

Yes, Kevin. It didn't work.


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Kevin CampRe: Motion blur problem at 16 bpc
by on Oct 9, 2014 at 6:59:21 pm

it seems like a bug...

i can't reproduce the problem in cs5, but adobe has obviously changed the way force motion blur works in later version, since in cs5 you still need to apply it on an adjustment layer to get it to work at all regardless of bit-depth.

the only workaround i can think of is to pre-render it at 8-bit.

you could try adding hdr compander before and after the 8-bit effects, but i doubt that will have any effect.

Kevin Camp
Art Director
KCPQ, KZJO & KRCW


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