I started this a long time ago. I had to leave it aside for a while but now that I'm back with it, there are several things I don't like anymore (a good thing maybe). I've uploaded the first sketch, the previous state and the latest with my corrections, so you can compare.
I was looking to create a classic cover-style illustration, a bit retro, with enough room to add some text.
In this attempt, I decided to remove all plants, or make them more integrated. I changed the arms pose, trying to find something with more silhouette and naturality. The gun should be clearly contrasted against the rock now, and not hiding in the other arm shadow.
I corrected the helmet and the neck again. The face is now better I think (it is not colored yet), although I have to work harder to find something with more personality.
I corrected the general proportion of the girl, to have the hips higher and more clear.
The suit wants to be like vinyl or rubber, reflecting slightly the surroundings and hiding all anatomy details, with some fabric for the "skirt" and "cape". I used several layers to simulate the color, the reflections, etc. combining them in different modes. I like the result, as far as it's going.
The ground will be like sand, covering most of the rocks.
I removed part of the dark areas in the closest rock. I think is less distracting now.
I've added a robot hiding in the dark cave, only the gleaming eyes clearly visible. Something to make it more narrative?.
Still undecided about the feet, the pose and the barefeet/booted issue, and how much opacity the helmet glass should have.
The light is not exactly like I pretended: It's not hot desert enough. I think is because of the way I painted the shadows (more contrast? I'm afraid it's too late).
I will appreciate general feedback, but it's the pose and proportions what I'm more concerned about.