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Report article RSS Feed Texturing human Skin without photos in Photoshop

This tutorial covers how to create some basic skin for your models without using photos in Photoshop from a lightmap texture extracted from your model.

Posted by fdslk on Sep 13th, 2010
Intermediate Textures.

0K! Boys and girls, this is a good tutorial for anybody interesting in human skinning in 3D Modeling without the use of photos, because almost all of us are poor bastards that can't afford buying some ref images and must make some juggling to get top-notch results.

So, first things first... human skin is matte, opaque, and its color depends of the blood. Yes, it depends of the blood, if you check out a dead body; you'll see the flesh is gray once the blood is over (Go to a med school for a visit, it's the best place to get started for organic modelers).

Now, why is this important? It is important because this way you'll be able to create a skin gamma color depending of the character you're skinning, if red, you know what kind of pigmentation it will have: from dark brown to dense beige, i.e.

Anyhow, let's get started, I'll cover the theory basis on the way.

I won't be covering UV mapping extraction, but I'll state this clear, when texturing, always use as a base a default gray (RGB 111) tone of a lightmap mixed with an Ambient Occlusion map on top on multiply. This way, you'll have a gray tone that will work for your starting point. If you'll use it for unlited purposes, just use the lightmap. In this case, I'll use the unlited version because I'm a bad boy.

1. Make sure your map is completely on a grayscale. But, do not use desaturate or grayscale mode to do it, because this will delete our color information, that indeed is something we don't want. For that, we'll use the Channel Mixer, just be sure to check monochrome. Adjust it to your belief. In this case, I used this setting.

User Posted Image

2. Now, here comes the fun, create another layer on top, this one will be your Flood color layer (This means: name it flood you idiot!) and fill it with a color you find attractive to your needs, since this is a human girl. Set it to overlay. I used this gamma of colors.

User Posted Image

3. Now, duplicate your grayscale layer and put it on top of your Flood layer. This layer will work as the Scattering color layer (name it, being organized is very useful, especially if your file can get very heavy on layers) and apply on every channel a Difference Clouds filter (Filters->Render->Difference Clouds) then set it to overlay.

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4. In the Scattering layer. Adjust the curves as needed, generally Input 65 to 75 do the trick and Output 60 to 70. We're doing this, because we need the colors to be saturated at first, so we can get a glance of the colors themselves.

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5. Then, set the Saturation to 60 (Press Ctrl+U)

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6. Now, go to Adjustments->Brightness/Contrast and set the Brightness to 70 and Contrast to -85. This will make the weak colors blend with the background and the strong ones (especially red) to be softer, just how we wanted it. Now, this is why I call this one the Scattering layer, it simulates the Sub-surface Scattering method.

User Posted Image

7. There are certain areas we don't want any red, so, we'll use the Dodge tool (midtones - exposure, depends of your tastes, but 50% is good enough) to make it go away. You can do this too to erase some dark areas if you want to. Or making other areas clearer in the Flood Layer, you know, for that effect of: "the sun doesn't touch you there"

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8. Onto details, we have some really decent skin by now, Why not adding some shiny stuff? So, I'll cover how to add some hair. Create a new layer and paint the areas where you want hair in a tone of gray you want.

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9. Apply a Noise Filter (Filters->Noise->Add Noise) be sure to keep it on Gaussian, and check monochrome.

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10. Apply a Radial Blur Filter (Filters->Blur->Radial blur)

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11. Set the Layer to Hard Light and then apply this settings on the curves (Ctrl+M)

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12. And done! That's how concludes my tutorial, you can now begin to add details. For example, I created some vector art tattoos I added on the file on a normal mode. For detailing, now you can get into the net and search for the parts you need, for example wrinkles or freckles and apply them on hard light mode, or ink over it... the possibilities expands a lot! As I say, this way you have learned how to create a somewhat realistic skin without photos, detailing... well, that's up to you and your drawing skills. I may continue with tutorials regarding certain zones and how to detail them. Good luck y'all!

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Final Result:

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Post comment Comments
Cryrid
Cryrid Sep 13 2010, 11:37am says:

Looks good in the preview, but I can't help but think the lightmap is too strong and directional (one side is permanently shaded) for a texture. Perhaps if it's opacity/strength were lowered, and the light was made more even/centered.

+2 votes     reply to comment
fdslk Author
fdslk Sep 13 2010, 12:26pm replied:

Well, that depends mostly in how you set up your lights in your scenery.

+1 vote   reply to comment
Cryrid
Cryrid Sep 13 2010, 9:07pm replied:

Unless you're planning for the character to not even move...

+4 votes     reply to comment
fdslk Author
fdslk Sep 13 2010, 9:24pm replied:

In this case, I did that. If you want to have some good centered light, the best way is creating a skylight with an omni light in the middle, right on top. And on render, disable the shadow casting, that way you'll have gray areas in a very symmetric way.

Or you can use the dodge tool in shadow mode to correct those imperfections.

+1 vote   reply to comment
Mkilbride
Mkilbride Sep 13 2010, 1:16pm buried:

(buried)

LOL

Good job, but you did this on purpose to make people laugh.

-6 votes     reply to comment
fdslk Author
fdslk Sep 13 2010, 1:27pm replied:

perhaps, or just to give a hand for those who can't find a way to make some skinning.

+4 votes   reply to comment
OhNoesBunnies!
OhNoesBunnies! Sep 13 2010, 8:48pm replied:

Thanks for this!

This really helps out... I wonder why some people will laugh; worse things happen in Life Drawing 106 with nude bodies. O:

+4 votes     reply to comment
Gen.Kenobi
Gen.Kenobi Sep 13 2010, 4:11pm says:

Can't wait for a GIMP tut.

+2 votes     reply to comment
TehBossRegime
TehBossRegime Sep 13 2010, 10:54pm says:

fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap fap

Done.

+13 votes     reply to comment
Killer_man_1996
Killer_man_1996 Sep 14 2010, 12:48am replied:

lol pervy guy...

BTW nice tutorial, but i make maps.

+3 votes     reply to comment
Lazy6pyro
Lazy6pyro Sep 13 2010, 11:42pm says:

Typically, you don't want to bake lighting/shadow information into your textures, as you want the lights in your scene to do that - this is especially true with next-gen engines. Baking lightmaps in your scenes also means that your lighting is final and static You, at most, want to use an AO map slightly blurred.

You did well to fake the light scattering, but you are missing a bit of back-scattering. The ears especially should have some red back-scattering, considering that you have a rim light on the top/back of the shoulder - meaning that light should be penetrating the back of the ears.

Honestly, if you have access to a high-quality render engine like Mental Ray, I would recommend using the SSS shaders and bake that out for the base of your color. You can even export out the epidermal, subdermal, and back scattering maps to gain even more control in Photoshop for the color texture.

+4 votes     reply to comment
fdslk Author
fdslk Sep 14 2010, 1:23am replied:

I didn't know that you could render to texture those, I'll give it a try, thxs.

+2 votes   reply to comment
este
este Oct 10 2010, 11:17am says:

Awesome Tut! thank you very mucho!

+1 vote     reply to comment
RequiemLux
RequiemLux Dec 23 2010, 8:19pm says:

very useful ; )

+2 votes     reply to comment
AmaroqDricaldari
AmaroqDricaldari Oct 27 2011, 5:04am says:

Can it be done in Paint.NET?

+1 vote     reply to comment
slownwise
slownwise Jan 8 2013, 3:09pm says:

Going to go try it out now!haha =)

+1 vote     reply to comment
lpandrade
lpandrade Dec 17 2013, 1:34am says:

Very nice tutorial. Good results, highly professional and easy to apply.

+1 vote     reply to comment
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