The 'work in progress' pic is posted at the bottom.
1/2 sheet, acrylic on paper.
A couple of close-ups (you may click to see details in the enlarged version).
The W.I.P shots, in three stages: As you can see, the initial drawing was directly made with brush and burnt umber. At stage 2, more of the background was brushed in using a mix of pthalo green and black (arbitrary choice). Some of this was brushed onto the figure in thin layers, so as to integrate figure with background (helps to take out sharp, cutout-like, sharp edges). Stage 3 shows the finished painting.
Many thanks to Marion Skydancer of deviantart for the reference image.