Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Tutorials & Guides => Topic started by: Stroncium on 2016-09-18, 15:23:43

Title: OpenEXR in Camera Raw Filter PS
Post by: Stroncium on 2016-09-18, 15:23:43

In this week I had discovered for myself capacity of OpenEXR from Corona Renderer. It is very useful feature!
OpenEXR file behaves in Camera Raw Filter (Adobe Camera Raw) as RAW file from digital camera, but it have superior dynamic range. ACR's tools can to extend it and eliminate overexposure and underexposure areas simultaneously.
May be anyone don't know this :)
You may to download images of my work as examples and compare them - Tiff 16bit (https://yadi.sk/i/L_r5k1ltvLHU4) and OpenEXR 32bit (https://yadi.sk/d/HclSb0gAvLHHd) for post processing only.

Update: I mean "Corona EXR" format. It is OpenEXR file obtained from Corona Virtual Frame Buffer - "Save" - "Dump EXR".

Title: Re: OpenEXR in Camera Raw Filter PS
Post by: Adi on 2016-09-18, 23:31:31

It's definitely useful , but I'm pretty sure a lot of people here are already familiar with it :)
I almost never use it , for me it's easier to export several jpg images with different exposure from frame buffer and then blend them if necessary :)

Also , if you use Photoshop's Camera Raw Filter, image automatically gets brighter (in 32bit mode). I'm not sure if that's a bug.

Of course, thanks for sharing your tip!

Title: Re: OpenEXR in Camera Raw Filter PS
Post by: Goran Gajic on 2016-09-18, 23:51:36

Thanx for sharing information. I opened exr and tested little. I didnt understand what is "ACR's tools". I played with your nice image, here is result. Hope you can explain more about exr for dummies like me :-)

Title: Re: OpenEXR in Camera Raw Filter PS
Post by: Dionysios.TS on 2016-09-19, 09:53:28

But how is possible to save in such format via Backburner process? O.o
And then, why not use the native OpenExr format? Which are the differences at the end? The native OpenEXR can be opened by ACR tools as well in PS.

Thanks,

Dionysios -

Title: Re: OpenEXR in Camera Raw Filter PS
Post by: Ondra on 2016-09-19, 09:58:06

it will be possible in 1.5 - although there is no difference in saving 3dsmax standard exr and coroan EXR dump when you are interested in just the beauty channel, not denoising or resuming the render

Title: Re: OpenEXR in Camera Raw Filter PS
Post by: Dionysios.TS on 2016-09-19, 09:59:26

Exactly, this is what I knew from the begining! :)

Thanks Ondra.

Dionysios -

Title: Re: OpenEXR in Camera Raw Filter PS
Post by: grafichissimo on 2016-09-19, 10:51:49

Hello mate, could you tell me exactly how do you open the EXR in max??
I am not that clever!
Cheers!