# Request- Film Response Curves (Comparing Octane to V-Ray)

**URL:** <https://forums.chaos.com/t/request-film-response-curves-comparing-octane-to-v-ray/54772>\
**Category:** General\
**Created:** [July 31, 2015, 8:18pm UTC](https://forums.chaos.com/t/request-film-response-curves-comparing-octane-to-v-ray/54772 "2015-07-31T20:18:43Z")\
**Posts on this page:** 1\
**Showing post:** 100

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**Author:** ![grantwarwick](https://avatars.discourse-cdn.com/v4/letter/g/77aa72/32.png) [@grantwarwick](https://forums.chaos.com/u/grantwarwick)\
**Post date:** [August 12, 2015, 1:18pm UTC](https://forums.chaos.com/t/request-film-response-curves-comparing-octane-to-v-ray/54772/100 "2015-08-12T13:18:32Z")

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> [@Bigguns](#):
>
> I know Lele might laugh again, but did you try out in AFX, PS is really crap to manage colors and bit depth, AFX is the best one of Adobe suits to handle those.

Thanks!

> [@vlado](#):
>
> Converts the Base map to a logarithmic color space before applying the look up table.  
> As I know the logarithmic color space, more closely mimics the natural light response of film emulsions compared to the liner color space.  
> This is film scan color space which provides better response in the dark end of the spectrum and doesn’t waste it on the dark end.
> 
> Hope this makes any sense.

Forgive me if I sound stupid here, I’m tired as hell!  
Basically, I load the LUT into V-Ray, it blows out. I untick SRGB (assuming that also plays a part in further distorting things from their intended purpose?)  
The LUT now (just for this tests sake, looks pretty good and I’m happy with it) is “correctly” being previewed in the VFB.  
So now, in AFX, I load the 32bit source file-  
What exactly are the steps involved to reproduce what I’ve previewed down the bottom?  
I feel like I’m reliving the multi layered material research here, it’s endless but I’m on the brink of finding serious use for it 😕  
Cheers for any help.

 ![](https://europe1.discourse-cdn.com/chaosprd/original/3X/6/6/665ae28015faa0ab3613f94355e6c47041f2ea8d.jpeg)

> [@importing vray material from max in maya](https://forums.chaos.com/t/importing-vray-material-from-max-in-maya/48150/9):
>
> I think my case can safely rest.

Bastard 🙂

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