Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: vkiuru on 2015-02-18, 16:46:27

Title: Combining two renders in PS or AE, to further reduce noise ?
Post by: vkiuru on 2015-02-18, 16:46:27

Same camera angle, lighting, everything. Let's say the other one rendered for 4 hours, and the other for 3. Is there a way in Photoshop or After Effects, perhaps through layer blending modes to merge these two so when combined, noise could be negated even further?

I'd appreciate it if any of you could share some insight!

Title: Re: Combining two renders in PS or AE, to further reduce noise ?
Post by: racoonart on 2015-02-18, 17:04:52

multiply the 4 hour render by 4, multiply the 3 hour render by 3 , add one image to the other. After that divide everything by 7 ;)
You could of course do it with fractions too.

Edit: Keep in mind that this has to happen in linear space!

Title: Re: Combining two renders in PS or AE, to further reduce noise ?
Post by: maru on 2015-02-18, 17:09:54

Correct me if I'm wrong, but if the images were rendered with locked sampling "pattern", then won't blending them only make the noise worse?

Title: Re: Combining two renders in PS or AE, to further reduce noise ?
Post by: vkiuru on 2015-02-18, 17:17:10

Thanks, DeadClown.. it's that simple, eh? :P

But then again, what Maru said below. Though I just switched from dailies to A7.2 in order to try out rendering an animation through Rebus Farm. I might be wrong but wasn't the locked noise pattern introduced in the dailies? Anyway, off to try out that setup DeadClown mentioned. Thanks guys!

Quote from: maru on 2015-02-18, 17:09:54

Correct me if I'm wrong, but if the images were rendered with locked sampling "pattern", then won't blending them only make the noise worse?