Thanks. Just mess around with all the tools in as many different ways and combinations as you can. Here I mostly used the brush tool on difference mode, as popularized by Miss DJ here, with different flows and opacities, sometimes with blend on or off...and also a lot of color/soft light layers, plus liberal use of sharpen and dodge... With digital art you can do more than just draw, take advantage of what you are given. :)
drawn in 16 min
drawn in 1 min