one thing.... good tutorial ! second thing: suggestion for you and all stock suppliers,keep doing what you're doing but change just one thing: background (try and think about us manipulators who try and make selection of the whole body while battling with the background who makes our life a living hell) using drapes is fine, but while you're at it, put those drapes in such a manner that they don't have ripples or other deformations that may cast shadows and are very hard to avoid.Also keep in mind that shadowing on the body may be applied (with a little skill in PS) so that's not such a huge must.What we do need is a good,distinguishable border between body and background,so we are able to clip the figure out more easily. Cheers !
But to oil painters having shadow is very important.... and added shadows tend to look very fake. True ! however just copying the shadows in the pic might not be a good ideea either... since you use the pic as reference, not "xerox" and just add around elements. Good comment tho !