Yes, it's done in photoshop. I always do my drawings with this program.
This drawing is a redo of an old pirate drawing (you can see it in the first step, more light than the face) I kept the old drawing in the background as a reference. The face is the actual drawing and I drew it over the old drawing to see if it would fit with the pose.
Yes, all is drew by hand, the only texture used was one on the leather belt, the chest one, to help it to look more realistic. There was no need to use it because those textures could be drawn, but I liked how it looked and I kept it.
The shadows are done by hand too. I play with them trying to make the drawing more realistic.
Yes, when I colour a B&W drawing, like this one, I do the same you do when colouring a B&W photo. I add a new layer with the color I want (in color mode) I merge the layers and them I adjust the colors with different photoshop options until I get the right tone, the tone I want, then I work in lights and shadows by adding them by hand.
It's all about spending time, a lot of time and enjoying working on details, being a perfectionist. This drawing is HUGE, I made to print it, so the details get a bit lost when you look at the small version.
All of that just sounds to art technobabble to me.

However you did it, it's still brilliant
