i was liking the blocky-ground much better ... it was somehow more "consistent" with the robots' look (like if the whole planet had been robot-ized)

hue-shift attempt + standing anim ->

hm. If i was a warrior bot, i'd avoid breathing hard when i'm aiming at a target for a mega-blast. I'd rather try to stand firm on my feets

Otherwise, the move is nice for a resting pause if the arms were more relaxed.

your last grass tile does it much better ... the dirt is okay for small places, but imho, it is too dark and probably too contrasted for large areas such as the one on the left of your mockup...

Do not hesitate to have grass really "invading" the dirt on the border ...

probably you'll need something like "a patch of dirter dirt" so that you can break the monotony
don't forget to try what your character will look like on top of it, too ... *that* is what should dictate the contrast/lightness/saturation of your dirt.

you captured a very interesting intensity in the eyes, indeed. Yet, there's something strange just below the right eye (on the left), where you seems to have a "light reflection" below the pupil while she obviously used dark make up near that area ...

That produces an effect as if her eyes was a light source (which makes her even more mysterious), but i'd be curious to see what it'd look like with something "softer" in that area.