Thanks for the comments, guys. Mirjman, you are right about the renderings being flat. I definitely want my next rendering to have more depth. And I see what you are saying about the mechanical look of some of the elements versus the sketchy line work. I'll have to think about that.
I appreciate the tip, Honolulu. I actually read a tutorial that suggested just what you mentioned. So I did incorporate some of those ideas on these renderings, but I plan to make better use of that strategy next time. You make a good point about the bleeding style not matching the paintbrush style. I'll have to try something a little different next time.
Thanks again.

Hi, my name is Jack. I'm new to the forum. I started a side business doing renderings. I wanted to get some constructive criticism. Don't be afraid to dig in. I did these renderings for a renovation project. I imported the sketchup images into photoshop, and I tried to give the impression that the renderings were done in color pencil. Let me know what you think. Thanks