Bump map is going to be created from the head texture map. First I removed all color from the image by going to image>adjustmenet>desaturate. After that the levels of the image were changed from image>adjustment>levels. Then the high pass filter was applied by going to filter>other>high pass. Then in a new layer using brush tool I draw some white circles in mole areas.
The bump image was uploaded to head material bump map. Once rendered the bump map makes skin look very rough. To minimise this effect I choose mix map at bump map options. Second color was set with noise map. Then in noise parameters fractal was chosen and size was set to 0.1. Back in bump map mix amount was set to 60. When rendered bump effect looks much more blended with whole skin map and all roughness is gone.
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