Textures are not just useful in Photoshop. You want to use them in Manga Studio as well. At least if you search for a tone in the Materials or a pattern brush to simulate a certain structure.
Though there come plenty of tones with Manga Studio you will come to the point where you need to find some external sources.
In this video I demonstrate how I did the wooden floor on the title page of Wall Street Hijack. Yes, you got me, I didn’t drew it and you don’t need to do this either. Let’s go: