I was wandering if anyone knows of a way get the T-Shirt all sweaty. I´m talking about a sweat stain below the neckline (i.e. Flashdance).

I've I thought about taking the T-Shirt texture to Photoshop and paint it on but I´m pretty sure it'll look fake. So I was hoping maybe some of the material wizards might have an idea on how to do this in the material room...

Thanks in advance, Petur

I would say photoshop it. I don't know of a shader that can do that, but I am sure BagginsBill will correct me :) Look at a ref pick on the internet, can't be that hard to do with the Burn Tool.

A map with a blender or math node to the diffuse and or specular  wet/damp is shiny and dark isn't it?)

You could probably use the Clouds or Spots node to control the blender.....

Quote - I would say photoshop it. I don't know of a shader that can do that, but I am sure BagginsBill will correct me :) Look at a ref pick on the internet, can't be that hard to do with the Burn Tool.

That's exactly where I´m at now.  I´m not sure how it will pan out though...

Quote - A map with a blender or math node to the diffuse and or specular  wet/damp is shiny and dark isn't it?)

That's the route I want to take. I´m clueless when it comes to the more advanced shader nodes but hopefully this might kick me into actually learning something ;)

I´m thinking I can draw where I want the sweat to be in Photoshop and use that as placement map for the nodes...?

Sweat stains on a sweat shirt like that aren't shiny they are simply a darkening of the cloth. Why go to so much trouble with nodes when you can burn in the stains? Or use the color mode and paint them in?

Quote - Sweat stains on a sweat shirt like that aren't shiny they are simply a darkening of the cloth. Why go to so much trouble with nodes when you can burn in the stains? Or use the color mode and paint them in?

Well, this T-Shirt comes in many color variations and it would be good to able to just switch the image maps in the diffuse channel in stead of adding the sweat to every single image map.
One sweat map and one color map if you know what I mean.

But I think I´m getting pretty decent results in Photoshop.  I paint on top of the texture on a layer set to Overlay. Render to follow shortly...

Use a trans map to define the areas and intensity of darkness and that way you can change the diffuse maps.

you could probably make it like a tattoo , and use a node to blend it with the original texture, maybe a color math node to darken the diffuse using the sweat stain map

Quote - you could probably make it like a tattoo , and use a node to blend it with the original texture, maybe a color math node to darken the diffuse using the sweat stain map

Yeah I tried that and it works as such. I´m getting used to how the nodes work. I´m a complete noob when it comes to the material editor...

I used a Tile node to make the pattern of wetness, but you could draw it. Whatever you make, it needs to line up with the collar area.

The Subtract plugged into Diffuse_Value makes it darker. I used .3 to make it 30% darker. Play with that, of course.

The Subtract plugged into Highlight_Size is varying the specular highlight size - duh. The dry parts use .3. The wet parts use .3 - .25 = .05.

Needs some bump, too. I used a Weave - but you can use whatever.

Ok. thank you Bagginsbill. I can see from your post I was using the math function node all wrong.
I´ll try this out and post the results.

Thanks

That looks fantastic, Vestmann. Wow.

You should write a tutorial on it. The presence/realism is excellent.

Is that VSS? So many people ask me how to get the wet look for VSS.

There is a point light in the lamp behind her at 50% intensity, blur radious 4, Shadow min bias 0.4
The spotlight to her right is at 70%, blur radius 10, Shadow min bias 0.1

The skin is done with VSS and Daz3d's Elite Lana. I set the PM:Bump at 0.08 and and PM:Shine at 1.2.  I love the PM:Shine control.  It makes it so easy to get a look like this.

Other changes I did to the VSS are suggestions you made for rendering with IDL. I lowered SSS to 0.1 and made the VSS color less saturated.

Wanted Meditation

i would use a reference and paint it on the texture.