Hi Jean,
Interesting results for such few cameras.
In regard to fine details of the skin, I think you will struggle to ever acheive the fine detail in the Ten24 picture (example you posted in the your previous post) using Photoscan alone.
I'm 99% sure that the fine detail in that image comes from using the texture(with some tweaks) to emboss those fine details into the mesh in ZBrush.
In terms of the number of points Photoscan is matching in your photos, you have a few things that are maybe not helping
- The subject appears to have foundation make up applied to his face(and some on the hat!) maybe you have done this to reduce reflections but it also gives a smooth even texture which makes it harder for Photoscan to find points in that area....and therefore less fine detail.
I would suggest using a polarising filter instead to reduce the reflections.
- The jumper/ sweatshirt has a very distinct pattern, in my experience this means that Photoscan will use up more of the points (you have set as the limit) to build that part of the subject.
Cheers,
Mala