For this particular drawing, I looked up a reference pose for parkour, and tried first to copy the very barest lines of the movement
Then, on a new layer (yes I admit I go opposite from Haiz in photoshop I am a layer
freak) I put flesh on the bones:
When I'm pleased with the pose, I add clothes and other details on yet another layer (leaving me free to erase what I don't like but still keeping the basic reference pose)
Time for coloring! First, I trace the lines of each article of clothing, each on their own layers (In this drawing, there's skin, boots, gloves, hair, jerkin, eyes and gray pants/shirt and collar)
Then, using the magic wand tool, I select the areas that shall be colored, and fill them in (Again,
Jazza is a lot more eloquent than me, I do it just as he explains)
And then I start width shadowing. Again, separate layers, where shadows are linked to the base layers. The very nice thing with clipping masks is that you dont have to worry about drawing inside the lines. You've already drawn those lines carefully
once, no need to do it again, hooray! And I've hidden the two base sketch layers, but for this drawing I'll keep the clothes sketch layer since removing it would require about two more evenings of fiddling with shadows and highlights.
Then I add a very cool effect called
backlight, which shows up especially nicely in paintings where I remove the whole base sketch. It's still kind of visible here. Basically, it is a lighter line at the very edge of every dark line, implying a light source behind Hanna. (At this point, I could do every article super-detailed, but since I'm trying to draw everyone, all the layers haven't received the same attention - the fur collar hasn't got any shadowing at all)
Finally I add in some background. This is basically just me experimenting with the differently textured brushes in photoshop.
Here's what Hanna would look like when I've removed the clipping masks: You see they're not strictly necessary but it helps to keep the lines clean
Ta-daa, the more-or-less finished product, Hanna the parkour scout: