Colors and LWF

[YoyoBoy]

I'm helping a friend out with a file of his. He isn't using LWF, but I want to make his scene look more professional by adding it. Nearly all of his materials are colored only by the material color slot. When I apply LWF all his deep rich colors get blown out.

Is there a script that I can run that will convert his colors back to what they are without LWF? I tried un-checking "Apply to color selectors" but that didn't do it.

Thanks.

[DanielBrew]

This will apply an inverse 2.2 gamma to all diffuse colours in all vray materials in the scene that don't have a texture in the diffuse slot.

(
	fn applyGamma col gam =
	(
		local r = 255*(col.r/255)^gam
		local g = 255*(col.g/255)^gam
		local b = 255*(col.b/255)^gam
		color r g b
	)
	for m in getClassInstances vrayMtl where m.texmap_diffuse == undefined do m.diffuse = applyGamma m.diffuse 2.2
)

It's a bit indiscriminate so make sure you save a copy of the scene first.

[YoyoBoy]

Thank you! It works beautifully!

[Deflaminis]

Also new versions of Vray have a "color gamma" slot in the VrayColor now. Not as easy to batch setup but an option for future people who poke in.

[Art48]

Also new versions of Vray have a "color gamma" slot in the VrayColor now. Not as easy to batch setup but an option for future people who poke in.

SO how would I translate say an RGB value of a customer for his company logo color with that VRayColor Map? Put it in there just as that said RGB then what?

[Deflaminis]

If you're converting to linear workflow then I'd say put a value like 2.2 in there for color gamma. My understanding is that isn't 100% sRGB accurate but it's as close as we can get.

[Syclone1]

in truth you will never get the exact colours right for the logos as the environment and lighting affect it quite a bit just like in reality. I usually take a sample in photoshop and take the RGB values in to max and tweek them till they are correct visually.

[Art48]

Nah, of course lighting will influence it, I'm talking about the pure correct diffuse color.

[Vizioen]

I'm helping a friend out with a file of his. He isn't using LWF, but I want to make his scene look more professional by adding it. Nearly all of his materials are colored only by the material color slot. When I apply LWF all his deep rich colors get blown out.

Is there a script that I can run that will convert his colors back to what they are without LWF? I tried un-checking "Apply to color selectors" but that didn't do it.

Thanks.

http://www.avizstudio.com/tools/acolormanager/ this is a scripted way of converting to LWF. I use it sometimes to convert old evermotion scenes in a fast way.

[DanielBrew]

It's a difficult one but if I'm trying to convert a colour reference given as an RGB I try to consider the white value of the scene as well as gamma. For example if I ask a paint company for an RGB for 'Pure Brilliant White' they will inevitably give 255,255,255. However in my scenes I generally use 180,180,180 for white paint. So I would treat other colours the same way, multiplying by 180/255 before trying to correct the gamma.

[Arjan Jacques]

Another script http://www.scriptspot.com/3ds-max/sc...massgammacolor
that lets you go back and forward from 1.0 and 2.2 gamma color space. I use it to convert old scene to gamma 2.2 Works great!
Link seams to be dead but a google seach will do

[paolo242]

Another script http://www.scriptspot.com/3ds-max/sc...massgammacolor
that lets you go back and forward from 1.0 and 2.2 gamma color space. I use it to convert old scene to gamma 2.2 Works great!
Link seams to be dead but a google seach will do

You can find it here...
http://andklv.narod.ru/maxscripts/ak-maxscripts.html