Today, my little Meetup group went to a local place, the trail by the Chumash Museum nearby my house.  (The Chumash are a California tribe.)  We were there for about an hour.  I began with a pencil sketch, and then, color.  We were settled in a small oak grove, with dark and light contrast about as contrasty as you can get.  At the end of the hour, this is what I had painted, knowing full well I would look at it and work it a bit once home.

Once home, I looked at the painting.  Still a need for contrast, and a bit more detail.  More pen, more ink brush, more colors, and some warmth.

Overall, the one above came out okay, but if you look on the mid-right, to the left of the furthest trunk, there is a bit of an odd space, so I went in and worked it a bit with ink to try to mitigate it.  I found it very distracting.  Here is the final image below.

The area has a few more lines in it, a bit busier, but somehow more in keeping with similar areas of the painting.

I used Koi watercolor brushes and the following paints:  Quinacridone Gold, Naples Yellow, Hansa Yellow Medium, Cerulean Blue, Cobalt Teal, Ultramarine Blue, Indanthrene Blue, Phthalo Green, and Burnt Sienna.  I used a Stillman & Birn Beta Series 8×10 inch softcover notebook, and scanned the images using my trusty, not rusty, Epson V600.  Ink is Carbon Ink, and an ink brush.