Well am back working on the Grand Canyon which is acrylic on paper and for me is a pretty large piece, 16x23.   It is pretty slow and tedious and I realized I really am doing the same thing over and over so am trying to use some larger brushes. However, I need to stay within the tightness of the original painting, hope some painting later to get looser.  Am getting to some ridges now where it is smoother rock and will have the final ridge come in cutting across the front, the pine tree and then the ledge we are standing on overlooking the canyon floor.  When I successfully complete this (how is that for positive thinking) I have some additional photos I am going to try.  The majesty of this place, the awesome large expanse of just rock and ridges that go on for 30-40 miles, nothing can really do it justice I think.  Am looking at the planes and will probably adjust the big mountain in the middle for more shadows.  I am working from multiple photos so you can see I am having to adjust lighting and can probably tweak that with glazes.