Not finished yet. Just learned how to do furs. Took 10 min off my precious drinking time. I was afraid my Jack and Coke would get warm, I like 'em at room temp. Now,
@JimInks is a published artist. I wouldn't expect him to chime in on this one time chicken scratch.
But, I'm going to.
When you draw textures on objects or living beings, and you know what you want it to look like, draw it quickly without thinking about it. Let your emotions guide your knowledge when you make quick lines. For instance, if you're drawing a werewolf, the best way to make those fur lines sparkle with energy is draw them quickly. You can always erase what you don't like and try again. Better yet, start over on another sheet of paper. In the act of drawing, painting, sculpture, etc., everything has its own inner life whether it's a human being, an animal, a building, rock cliffs, trees, fire hydrants., etc. If you can channel that inner life that you perceive to the exterior of whatever image you are depicting, you'll be adding your own sense of self as you bring it into being. It doesn't matter whether it's the main focus of the piece or background objects. Treat them all with the same sensibility.
Here's an example: Joe Kubert brought everything to life with an energetic line. On the page to the right, notice the birds flying behind Tarzan. They aren't dramatically drawn, but they help give a balance to the scene and depth of space, looking alive with a contrasting serenity to what is happening in front of them.
Here's another example: notice in the first panel of that page how alive the water seems even though it's not a living form. But, you can feel life in that water besides the human form of the young Tarzan.