Thank you a lot Xrok!
I didn't know there was such a clear tutorial about this!
I use a slight different workflow in PS, and obviously didn't know about the Z-depth image exporting technique
I think I'm gonna put a tutorial together anyway, and include some cases of blending between Sketchy images and actual renderings. I think it's always a good thing to have some portable PDF documents one can carry everywherem even with no internet connection...
Oh, I intended to aim the tutorial to Indigo/SkIndigo users, btw.
What do you think? Could it still be a nice idea?