Linear Workflow in SP3

[instinct]

Well the problem is that you need to ensure that all workstations and all slaves do have the input gamma set to 2.2...or it will look differently. can get fishy with roaming profiles and alike.

Regards,
Thorsten

[rmejia]

Vray 'Color Mapping'
-Check 'Linear workflow'

All of the settings look right, except you don't need to check the "Linear workflow" option in the color mapping since you already set up all the options in the 3ds Max Gamma and Lut settings. I believe it's one or the other, but not both simultaneously.

[fourthand11]

This is the explanantion in the 'manual'.

"Linear workflow - when this option is checked V-Ray will automatically apply the inverse of the Gamma correction that you have set in the Gamma field to all VRayMtl materials in your scene. Note that this option is intended to be used only for quickly converting old scenes which are not set up with proper linear workflow in mind. This option is not a replacement for proper linear workflow."

Now I remember reading in an older thread where someone asked vlado for a lwf check box in the VrayMtl Diffuse slot so we wouldn't need to use VrayClr maps to adjust the diffuse color gamma. And Vlado's answer was that he was adding this linear workflow check box to the color mapping so we could bypass the VrayClr map method.

So even though it seems to be intended for old scenes I guess I'm thinking of this 'linear workflow' check box as a faster way to work on future projects as well. No?

[Wingman3d]

i have heard that if you save out render elements to .exr (Vray: frame buffer--> vray raw image file --> file_name.exr) you only have to leave the color mapping at 'linear multiply' and do nothing else. Then you composite with the seperate render elements in Nuke\After Effects\Photoshop or whatever. (example: (diffuse*raw GI)+(diffuse*raw light)+specular+reflection)
Is this true?

[davidr]

I'm wondering if I've been running improper LWF.

If I run this configuration from here on out is it accurate?

Max 'Gamma and LUT' settings:
-Check 'Enable Gamma/LUT Correction
-Gamma set to 2.2
-Check 'Affect Color Selectors'
-Check 'Affect Material Editor'
-Bitmap Files Input set to 2.2
-Bitmap files Output set to 1.0

Vray 'Color Mapping'
-Type 'Gamma correction'
-Gamma set to 2.2
-Check 'Don't affect colors'
-Check 'Linear workflow'

Material Editor
-Do not override bitmap gamma
-Do not use VRayColor map to gamma correct diffuse colors

If this is correct it just seems easier than adjusting each bitmap and diffuse slot. If I'm wrong than I suck. Ha ha.

file output depends on what you're saving as: for tif, jpg, use output gamma 2.2. For exr, hdr, use gamme output = 1.
Uncheck 'linear workflow' button in colour mapping, since you're already set up for LWF. Since you set bitmap file input to 2.2, you don't need to think about override/not override bitmap gamma for each map you load -it will automatically be correct. Diffuse colours are another matter, and I do this: copy colour swatch, add Vray colour map to diffuse slot, set type to 'specify', paste the colour, then, if you want, you can set the type to '3dsmax' AFTER you've pasted the colour, and then you'll have the gamma-corrected RGB, in case you need to know, or use it in mental ray, etc.