However your post confirmed an idea and I checked the skull cap of the towelhead-hair. This skull cap happens to be rather extensive, covering almost all her face like an ancient greek helmet. Once removed the orange glow was gone. About the same problem seems to occur with clothing where a transparency map is applied : the invisible part of the clothing shows up as an orange shadow on the skin. So this is a shader ideal for rendering bald naturists. One problem remains : the red around the eyes.. There are no eyesockets so maybe the problem is again a transparency map : the eyelashes.

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