Female Orc Part 2 and Thoughts on Light

I've made some more progress with the skin and based a lot of her clothing. Here's a quick look at my latest progress.

One of the areas I wanted to work on with this figure was my use of ambient light. The general idea is how does light bouncing off the environment show up on the figure? In some sense, we all include this without thinking about it. Basic zenithal lighting (or the stop sign rule for the historical painters) has you transition from lightest at the top (or surfaces facing the light source) to darkest at the bottom (or surfaces away from the light source). If we actually excluded all of the ambient light and only had the single direct light source, every surface pointed away from the light source would be completely black. Instead we gradually transition to our darkest shade and even surfaces angled away from the primary light have some light hitting them (bounce light from the environment).

What I want to work on is using that light to convey more information about the environment and by that I mean color! Assume the surrounding environment is primarily one color (yellow for a desert, green for a field or forest, etc). That color light would be reflected back at the figure and tint the shaded regions. For this piece, I plan to have her over a primarily red base, so that will be my ambient color.

One important question to ask is how does ambient light differ from OSL? Strictly speaking, ambient light is a form of OSL in my opinion. Light is bouncing off the environment and hitting the figure. Thus the environment is my light source. However, unlike OSL from a lantern, the source is not concentrated but distributed over the entire ground. So it should be treated more like a directional light (up from below) rather than a point light source. We likely also want to approach the fall off and intensity a bit differently from typical OSL. With traditional OSL, we want that light to be dramatic! So you probably have a strong intensity near the source and then all that to quickly fall off with distance. For ambient light, the source is probably far more subtle (it's just reflected light, the ground is not generating its own light). And thus the fall off should be more gradual (or subtle) too. Now, let's say the primary light source is very strong and the environment is reflective/shiny. In that case, quite a bit of light might be reflected and thus you would have a stronger intensity to the ambient light. That is of course a special case, but I wanted to point it out as you should consider what you're painting and how it might affect the 'rules' rather than just blindly following them.

Below is a close up of the back of the orc (where you will see most of the ambient light at the moment). I'd say it's somewhat exaggerated, but I didn't want to go too subtle and not be able to tell it was there. Besides, the skin could be a bit reflective (satin finish) and thus pick up a bit more light. Still, I think the light is not too strong. You can compare that to the more intense OSL I used on the orc bust. Also a light from below, but meant to imply a source generating light rather than just a reflected light.