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Blur Nodes Not Working With Exr's

blur exr fusion not

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#1 drainzo

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Posted 16 March 2012 - 12:11 PM

I've had this problem for a while now when im using EXRs in fusion (either 16 or 32 bit float and have an alpha channel). Whenever I use any of the blur nodes or soft glow, certain frames of the footage will have that footage deleted completely, almose like subtracting it from the comp (I will see the checker background in place of my footage). The thing that is strange, is if I tell the depth to be 8 bit it all goes away.... anyone have any ideas or have run into this problem before?

Thanks!

#2 SecondMan

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Posted 16 March 2012 - 12:12 PM

have you got massively negative values in your exrs?

#3 Tilt

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Posted 16 March 2012 - 12:58 PM

you have single pixels with infinite values in your exr. You can detect and clamp them with a custom tool, where they will neither be >= 0 nor <= 0.

edit:
http://www.pigsfly.c...?showtopic=7145

#4 drainzo

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Posted 16 March 2012 - 04:14 PM

ah thanks.... so that other post you linked to has that script, where do i run that agian?

#5 SecondMan

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Posted 16 March 2012 - 04:39 PM

Just copy and paste that code in your comp. It's a custom tool, not a script.

#6 drainzo

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Posted 16 March 2012 - 04:43 PM

ok i made this into a macro and ran it, i just dont know how to clamp them and fill them with surrounding pixels. When i go to the alpha channel of the "Detect_Gremlins" tool, it appears to just be solid black. How do you use this to clamp the nan pixels and rank filter them?

Thanks man!

#7 karahana

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Posted 02 April 2012 - 07:17 AM

Happened to me with renders from mental ray a couple of times, only one pixel would be the problem but with values like -0.00001-e or stuff like that. Also The 3dguy who worked with vray experienced it a lot. Clamp it and should go away. It can happen in Nuke too.





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