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Guest Sycosplat

Skin Realism

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Guest FR3SH
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  • No specular map goes to the diffusion chanel!!

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    No specular map goes to the diffusion chanel!!

    that depends on what you want but in most rendering engines you would have a specular colour map option and a specular map option and diffusion channel doesnt exist(dont know why c4d has it)

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    Guest Sycosplat
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  • Argh!

    Thanks a million for the comments and help, guys.

    But I'm stopping right here. I've tweaked and rendered myself into a depression, with result not nearly resembling anything that can be called realistic.

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    Guest MilesBaskett
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  • Actually the diffusion channel is better for controlling how much(and where) light diffuses on the object when making a skin shader. The more oily parts will diffuse more light, granted, however a specular map is too sharp of a contrast alot and can make the GI perform in some very unrealistic ways. The map you use in the diffuse channel should be more soft and of less contrast. If the specular has any 100% black, those areas basicly stop bouncing light in those areas where the white areas almost mirror the light off. You need a color,diffuse,specular(with color information), and bump/normal maps at a minimum if you want to have the most control of the skin and how it behaves under any lighting set-up.

    I agree with scott on the color too, if the skin is colored in the way he describes, and has the redish hues added in(through shaders), the shader and light interaction is what makes the model look more real compared to ones that use overly red/pinkish texturing. You should be able to desaturate the skin texture of its red hues, and then have it added into the model properly by shining a light source on it. Also don't forget, you can use SSS,chanlum,Lumas,ect in the mask channel of the Fusion shader so the light actually drives how the other shaders or even texture maps interact with one another.

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    Guest Sycosplat
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  • Thanks a bunch for the advice, guys.

    I really appreciate it.

    Though still far from perfect skin, I think there is a definite improvement.

    Edit: Added slight SSS improvement.

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    You can get the basic skin material pretty realistic just using procedural textures without any image maps. You can then use image maps to vary the coloration or speculars later. Here is a good tutorial on making a skin material and also how to overcome C4Ds tricky SSS shader:

    http://planetpixelemporium.com/tutorialpages/skin.html

    As mentioned before, skin isn't pink. It gets it's reddish colour from blood but most of the skin colour comes from melanin.

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    Guest Sycosplat
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  • I have seen that tutorial before. But I find it nowhere near realistic whatsoever.

    Thanks anyway.

    The color map is desaturated/nearly grey.

    The color comes from the SSS alone it seems, or perhaps it was the light. If I take out the color map, it looks pretty much the same.

    With this picture, I toned down on the red hues in the absorption filter. Overly red hues combined with the grey skin color seemed to create the pink skin tone.

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    Guest Sycosplat
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  • Yes, I'm having problems with the bumbmap, which was made with zbrush and applied through a UV. Unfortunately, it seems that scale around the nose area among others.

    I'm not sure how I can fix it without having to remake everything.

    My progress so far based off of comments.

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    You should drop a checkerboard texture on top of it to see what happens. Could be a UV problem :)

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    Guest Moocat
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  • dunno if anyone mentioned this, but i think it would be good if you smoothed out the bump map for the inner ear and nose area. that's a very oily/waxy area and the bump map makes it look kinda more like a sculpture than skin in that spot. Also, have you messed with SSS at all? I have been experimenting with it a lot lately, thanks to an excellent tutorial i found. if i was on my desktop machine i'd link it to you, but i only brought my laptop to visit my family for the weekend. the skin also looks a tad dry in general, perhaps mess about with the specularity! i'm terrible at textures but hopefully these tips helped a bit.

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