The problem with using photos is that the lighting is already affecting the skin in the photo, and then again on the model. So it's tricky. You need to get very high quality and well lit images for it to work well.

A good approach to start with would be to find a good merchant resource and use that as your base. Then blend in details from your photos.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3