this is the asset that I am working on to get the likeness based in the self-portraits of Rembrandt, this is a little bit challenger because I can't find all the angles that are necessary to sculpt the head information, missing some profile references, but presuming with the 3/4 and the frontal images I keep going trying to nail it..
I am on the process yet!!! sculpting the details and going back to fix some structural issues with the likeness and so on.