proper render settings for redshift

[Kris Rivel]

I'm a virgin to the whole linear/gamma lighting method. I'm old school and render out 8bit stuff mostly. I noticed in reshift, the default gamma setting makes everything in the region, render, etc. look light and washed out. Changing it to 1 looks normal. But if I want to properly render out exr, what should I have these set to? After rendering and wanting to do some post work in photoshop...what should my space be set to so I'm seeing/working with the right thing?

Kris

[Pierre Schiller]

Straight to the pie:

1. For shaders (so they don´t look washed out) place a Color correction node. And set their gama into 0.45 (that´s 1 divided by 2.2). The shaders will look nice again.

2. For the texture files (images), go to their "adjust" tab, find Color Profile (should be on linear) and there for you see it washed out. Set it to SRGB and you should see your textures in wondercolor. :)

This is all assuming you already checked the boxes on File>Preferences>Display>Color managment and ticked:

Apply to:

Render regions and viewports

Render pass and preview

Shader balls

UI widgets

FX Viewers.

And of course checking all your gamma values are on 2.2

Hope this helps.

David.

On Thu, Jun 18, 2015 at 12:53 PM, Kris Rivel <kris...@gmail.com> wrote:

I'm a virgin to the whole linear/gamma lighting method. I'm old school and render out 8bit stuff mostly. I noticed in reshift, the default gamma setting makes everything in the region, render, etc. look light and washed out. Changing it to 1 looks normal. But if I want to properly render out exr, what should I have these set to? After rendering and wanting to do some post work in photoshop...what should my space be set to so I'm seeing/working with the right thing?

Kris

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[Kris Rivel]

Great thanks...was hoping it was just a few settings and not tweaking each shader...but it is what it is. Is there another way via just exposure settings in Photoshop and render settings in Soft?

[Ognjen Vukovic]

Actually i dont think you should be color correcting your shader nodes, that doesnt sound like a very smart thing to do. All the native color managment settings in the softimage settings should be off by default, and then you leave redshift to correct everything for you, all you have to do is to make sure that your displacement images are set to linear in the image node, and color textures are set to srgb, and that you have "Automatically correct color inputs" switched on in the redshift settings to correct all your shader color parameters. Theres no need for anything else then that. In redshift your display gamma will be set to 2.2 and output will be linear for exr by default.

[Kris Rivel]

Thanks Ognjen. I did what you suggested but I'm still getting a slightly washed out render that's a bit brighter. Must be something else I'm missing?

[Ognjen Vukovic]

Thats the look you will usually get compared to a wrong set up with linear workflow, the picture generally look a bit more washed out, but when your start working with composting operations in your shader tree you will get the correct calculations, especialy with multiply nodes between textures and simmilar. The rest is down to the lighting, or you could plug in a redshift photographic exposure node and tone map your image the way you like it, or do it in composite.

Check out the rs documentation, theres plenty of stuff in there, also check that your render region is using the same settings as your global scene settings, it could be that its different and it didnt pick up on the correct color inputs tab.

http://docs.redshift3d.com/Default.html#I/Gamma.html

[Ognjen Vukovic]

http://docs.redshift3d.com/Default.html#I/Photographic%20Exposure%20Physical.html

Heres the physical camera docs, this should help you tone the image yo your liking.

Just plug it into the camera, or pass shader tree.

[Toonafish]

I'm trying to use the auto FK/IK blend slider in my kinematic bone
chain. But no matter what I do, as soon as I set an FK keyframe in my
bones, the IK stops working for all the bones but the last one.

When I use the slider, with the IK effector and FK on the bones
keyframed, only the last bone is effected. The rest only responds to FK.
Even after aI delete all the FK keys on the bones, the IK seems broken.

Is this a bug, or has something changed in the way this is supposed to
work ?

Using 2015 SP1

Thanks,

-Ronald

[Toonafish]

already solved....

I keyed the position on the bones as well.

sorry about the noise...

-Ronald

[Tim Crowson]

To echo Ognjen here... We have all our Soft Color Management Prefs unchecked, and we let Redshift handle everything. If you're rendering to a color space like sRGB, then in the 'Output' tab in the RS settings, under the Gamma section, set the File Output to either 'Use Display Gamma' or 'Use Custom Gamma' set to 2.2. If you're still seeing textures washed out, then their Color Profile may be defaulting to Linear, which would cause the wash-out (since you're rendering to sRGB 2.2).

Back on the Output settings tab in RS, you might also want to enable 'Automatically Correct Color Inputs', depending on your workflow.

Now, I almost always add a color correction node to all my color tetxures in my shader trees, but I leave the values at their defaults. This is just to give me controls later at the shot level. I certainly don't drop the gamma to 0.45 on all the color correct nodes. That's simply not necessary if RS is handling it anyway, and XSI's color management stuff is off.

-Tim

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[Byron Nash]

Tim, when I set all my Softimage Color Management Prefs to "off" the colors don't look correct in the region. I am interpreting all the input textures correctly as either sRGB or Linear as needed. I do not have Automatically Correct Color Inputs (Redshift Settings) or Apply Gamma Correction (Pass) enabled. It looks correct when I have all the boxes ticked in the Softimage Color Management prefs. 

[Tim Crowson]

Weird... I have noticed that sometimes, the 'sRGB' option for image profiles doesn't actually work, and I have to set it to a custom gamma and use 2.2 for it to look correct. But I have to say that all my prefs for color mgt are off, and textures and colors look right. Of course I also render out to linear space...
-Tim

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[Kris Rivel]

Thanks guys...some good stuff here! So what about environment lighting...hdr/exr stuff...linear or sRGB for that?

[Tim Crowson]

For lighting EXRs and HDRs should be interpeted as linear. That said, sometimes I'll cheat things a bit if I'm using a dome light that isn't visible to camera and bump up the gamma slightly, which can give some interesting results lighting wise. Just depends.

--

 

Tim Crowson
Lead CG Artist

Magnetic Dreams, Inc.
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[Ognjen Vukovic]

+1 on the above. The gamma is just pumping the contrast back into the image, but that's artistic control, and a good one at that.