Preparing textures for Octane

[jagger]

Hi!, Im getting problems viewing textures from photoshop in octante, they are too dark/ contrast in the render.. so weird.

My scene is in linear and when the octane material is created the texture slot is in linear too but when Im editing in photoshop Im in srgb workspace...

Is this correct? Is there some workflow to make the textures?

thks

[LFedit]

I'm starting to look into these processes myself. I haven't tried it yet, but try applying a .454 gamma to your textures then bring them into octane and see if that helps. the .454 is the inverse of gamma correction. ie: 1/2.2 = .454545. So essentially your un-gamma correcting the file. This can also be done in the Levels filter, moving the midtone range to .454. I'm not infront of octane right now, but would be interested to know if that would work. Let me know i'll try to work through it when I get some time.

[aoktar]

render.otoy.com/forum/viewtopic.php?f=21&t=33214

[LFedit]

Thanks Aoktar, I'll have to really dig into that article to design a perfect workflow for what I'm after. Thanks for the reference, this is a start to learning this process in Octane however!

[jagger]

ok uff.. its a bit complicated.. so is this a correct workflow?

1- edit images in photoshop as normal (srgb)
2- set the cinema 4d project to linear
3- when loading the texture in the octane material,put the texture and set the color profile to lineal, put a octane color correction and set 2.2 in the gamma section


I tried this and the results are the same, no changes when changing the gamma to 2.2 and still looking bad.

in fact, in the dark zones of the texture, it is very very black, I can burn the image but that part still super black.. and its suppose to be dark blue...


any idea?

[jagger]

ok I did this:

put a color correction in photoshop with gamma 1.5 and now the texture looks better in octane, later put 2,2 in photoshop and the texture looks brigther (of course), the strange thing is that octane not always updates the texture and seems that the only way to "reset" it is rebooting cinema 4d, the reload thing in the octane window doesnt work.

[aoktar]

ok I did this:

put a color correction in photoshop with gamma 1.5 and now the texture looks better in octane, later put 2,2 in photoshop and the texture looks brigther (of course), the strange thing is that octane not always updates the texture and seems that the only way to "reset" it is rebooting cinema 4d, the reload thing in the octane window doesnt work.

i'm curious about your camera imager settings and lighting environment? (try linear response and gray environment) I think this things is giving some illusion

[jagger]

Hi Aoktar, I submited the scene in this new post with this new problems:

http://render.otoy.com/forum/viewtopic.php?f=30&t=37250

[LFedit]

i'm curious about your camera imager settings and lighting environment? (try linear response and gray environment) I think this things is giving some illusion

I was using just default lighting from a new scene, just adding a OctaneCam tag with no FilmResponse. I'll try it with the grey environment though to see if that changes any thing. I have a render going overnight, but will try to test it tomorrow.

[jagger]

Seems like when you put filmresponse in linear the textures have a lot more contrast. Im not sure if that is the correct linear workflow way but is really hard to get a nice render that way.. Btw Im very newby with octane so Im discovering new things.