I have done and learned a lot about portrait retouch. First I started with simple blur, then moved on to surface blur with reduced opacity. Then I got lazy and started using pre-made script. But they all turn out kind of fake; I always end up losing texture and depth/dimension. So the face looks kind of… flat. Finally I learned a new technique that smooths out the the skin bumps; yet keep the texture around. I must say, it really works. It’s a lot of work; but definitely worth it. Check it out. Isn’t it amazing?