Is it just me or is the lighting a bit off in the second picture from your first post? Seems like that candle behind her should be a dominate light source, but not sure if it is doing much. I’m terrible with lighting though.
What kinds of effects are you using in the last two? Very interesting.
You are probably right with the lighting from that candle although I still like how the render turned out.
I use Filter Forge which has a huge library of filter effects and my postworking usually uses sevral filters in varying degrees overlaid on my original render to create more of a piece of art than a 3D render.