Saving out a linear exr in 1.31... bug?

[raylab]

Has anyone had any luck with saving a linear exr with Octane 1.31? As i remember it worked great in 1.18.

[dawe]

Yes it´s obviously something wrong. You have to use 32bit, full float. if you use 16 half it will break the image as you must up the gamma to about 4.
I asked karba about it but got no answer..

//Daniel

[raylab]

Ok thanks! But for me it looks like it breaks the image even in 32bit, hope they will have a fix or work around soon!

[Karba]

Just tested, it works fine.
What exactly doesn't work?

[dawe]

Just tested, it works fine.
What exactly doesn't work?

I can´t speak for the result in 2013, but in max 2014 the image gets way to dark. I use linear and sets the Octane render window to gamma 2.2. When I save it out to full floating point exr, gamma 1.0 and bring it in to eg Fusion. and ad a LUT or a color-corector node It´s way to dark if I set it to Gamma 2.2. You need at least a gamma about 4.5 to get similar result but you allso need to lower the gain to get similar result. so it looks good kwhen in the octane render window but gets to dark when you sav it out to max.

//Daniel

[Karba]

Just tested, it works fine.
What exactly doesn't work?

I can´t speak for the result in 2013, but in max 2014 the image gets way to dark. I use linear and sets the Octane render window to gamma 2.2. When I save it out to full floating point exr, gamma 1.0 and bring it in to eg Fusion. and ad a LUT or a color-corector node It´s way to dark if I set it to Gamma 2.2. You need at least a gamma about 4.5 to get similar result but you allso need to lower the gain to get similar result. so it looks good kwhen in the octane render window but gets to dark when you sav it out to max.

//Daniel

Set 3dsmax gamma to 1 everywhere if you want to get linear output.

[face]

Maybe this helps also a little bit.
http://render.otoy.com/forum/viewtopic. ... 10#p173394

face

[dawe]

I´m fully aware of how to work linear. What I try to say is that there is a total change in the way image behaves when copied to frame buffer. As an example see image. This is rendered linear, gamma 1.0 and copied to frame buffer. Max gamma correction is turned of, so it shoul´d look the same. at least that´s what it used to but now it looks like this.. I know this is only 24bit but you still se the differense

[raylab]

I tried my scene in 1.25 and everything works fine again. So it looks like the problem started in 1.31.

[dawe]

Maybe this helps also a little bit.
http://render.otoy.com/forum/viewtopic. ... 10#p173394

face

That was some perspective on it. Thanks. And it´s clearly stated that it´s a change sins 1.31 over previous ones.