Hi - not sure how useful below is but incase of interest.

Toolset - PoserPro11, Substance Painter/Designer,Zbrush,Gimp and a bit of vue. Miopic photos come from a RX100 or an old D300

Thirdy party resources I use - These are free and worth a look if not already on your list - HDRI maps - https://hdrihaven.com Textures - https://www.textures.com/ (used to be cgtextures.com)

If you like the lighting in my renders its worth checking out hdrihaven as they have a high EV range and don't always require additional lighting (see http://blog.gregzaal.com/2016/03/16/make-your-own-hdri/ for more details on how they differ from standard hdr).

Workflow - export model from Poser into Substance Painter and build PBR maps. Export PBR maps and build mats in Poser (via Script). For lighting use HDRI map set-up on BB's envsphere or Poser standard ground plan. Iterate and tweak lighting and mats to get desired mood/effect. After render load png into GIMP and use layers to adjust contrast and colours.