so here is a WIP.
I chose a small restaurant located in the city wall.
This is the lair of the guards who live in the fortified gate.
The drawing is made on cintiq 12X with photoshop

1 sketch
wip1.jpg
2 inking
wip2.jpg
3 setting up the colors. At this stage they are only plain colors
wip3.jpg
4 I work atmospheres. On different layers I make lights or shadows. I switch the shadows layers into "product" mode and layers lights "overlay"
I also add color degraded to "break" a little smoother side of photoshop
wip4.jpg
5 I flattened all my layers colors.
at this time I add all the details. I painted. This is the less technical phase
wip5.jpg
6 Finally, on my color layer, I added "noise" filter. It gives a grain pattern that gives one side "handmade"
wip6.jpg


the drawing is not completely finished.
I will continue to work a little atmospheres with layers of ambainces

Hope it can help some