Why when i load a skin the skin eyebrow and lips are coverd with basic the P4 color you can see the under the colored eyebrows or lips

When you load a head or body skin texture, it only assigns those two materials for the figure. In order to texture lips, nipples, tongue, etc, you must assign the same texture map image that contains the texture as the head or body to the relevant materials, whichever applies. So, for instance, to assign lip textures, you must set the lip texture to the same image as your head texture. The reason for this is that some people will make separate textures for the head skin and lips (same location on different images) so that they can apply different lips to different head textures. But if you are using the same image, you must point each separate material item to the relevant texture map image. You can access the list of materials for each figure by clicking over the "Materials" drop-down list in the Materials window. Select the material (lips) and assign the skin Texture Map (and other maps where necessary). Kuroyume

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Couldn't have said it better. But also, don't forget about trans-maps for transparency. This is especially important for eyelashes and eyebrows. Good luck!