Before I add the lighting to my skins, I use luminosity and color to create the tridimensional subject.. Once its sculpted, this is when I start adding the visual effects/ambience on top. Here's a diagram that explains what luminosity is:
https://imgur.com/nszK41L


My friend for the longest of time, a year, always loved the skin without the ambience, however I did not make a saving of it. So, I decided to finally recreate it. The update is found on the description as an appended downloadable file with a screenshot of it.