OSL goodness in Vray

[alperenozgur]

are there any metalness workflow shaders made with OSL? sorry if it is irrelevant question i just dont know how it works or what exacly itS doing.

[sharktacos]

Thank you those artifacts are gone. Your OSL work is incredible thank you.

Thanks

[stevejjd]

Thank you those artifacts are gone. Your OSL work is incredible thank you.

[sharktacos]

Hi guys,
I would like to ask for some help regarding the Fabric OSL.
I am trying to make a very soft fabric but it has a strange mirror reflection.
I get strange artifacts on my test scene.

Note that the version of the shader on my page has a lot of improvements over the original version on the Chaos page. Most significantly it fixes an error with the reflections. This may be what you are experiencing.

[stevejjd]

Does not seem to work for me. Im using window 10 and 3ds max 2015. Actually I try to increase the bump amount and it make the shader look more like a mirror.

[stevejjd]

Hi guys,
I would like to ask for some help regarding the Fabric OSL.
I am trying to make a very soft fabric but it has a strange mirror reflection.
I get strange artifacts on my test scene.

[stevejjd]

Thank you.

[sharktacos]

it's a comp question. Additive is equivalent to doing a "plus" in comp, and "normal" is equivalent to a "over."

[stevejjd]

Thank you for that hint ~ I wanted to ask why or when would I set Vray blend modes to additive ? What are examples of when you want additive or 'normal' blending mode? Thank you

[sharktacos]

Haha I don't know any codeing, I rely on amazing people like you who truly know what they are doing. People definitely add sss to cloths to add softness and sss gives the two sided material effect. I'll look for a reference for you.

In that case, just combine the Fabric OSL with an SSS material using the VrayBlendMtl set to additive.

[stevejjd]

Haha I don't know any codeing, I rely on amazing people like you who truly know what they are doing. People definitely add sss to cloths to add softness and sss gives the two sided material effect. I'll look for a reference for you.

[snivlem]

Thanks sharktacos!

[sharktacos]

Oh sorry, still getting used to this forum - thought I posted a reply directly to the cloth OSL shader. I mean, is it possible to add SSS to the cloth OSL shader as I see many artists blend cloth materials with an SSS.

Well, the beauty of OSL is you can just take my shader and add your own SSS closure to it.

The question I'd ask is why they are doing this? I'd imagine it is to get translucency. If that's the reason then a two-sided material might be better suited.

[sharktacos]

hey sharktacos,

where are you applying linear workflow on your fabric.OSL?

MainColor = pow (MainColor, 2.2);?

I've since removed this line under V-Ray 3.3 and Maya 2016 because of native color management. Is this the only thing you did to "correct" linear workflow for older versions?

Yes, that is the only place. Note that the version of the shader on my page has a lot of improvements over the original version on the Chaos page. Most significantly it fixes an error with the reflections. It also has a gamma input field so you can choose whether or not to use the gamma corrections, and it works with both bump and normal maps.

[stevejjd]

Oh sorry, still getting used to this forum - thought I posted a reply directly to the cloth OSL shader. I mean, is it possible to add SSS to the cloth OSL shader as I see many artists blend cloth materials with an SSS.