Here's the first pass on my little diptych: on the left, a mix of wet-in-wet and wet-on-dry painting. I washed out an evergreen I had painted in the left-corner foreground, and also some unconvincing and distracting foliage from the right corner. It lifted really well--one of the characteristics of Fabriano paper--especially considering it was green!
On the right, not much yet, the first pass of blue in the study I'm going to build by glazing.
Second step: On the left I've repainted some of the trunk that was washed out when I removed the evergree. On the right I've added a wash or raw sienna, and I put in some shadows, changing their direction from what they are in the photo ...
I'm going to stop with these for today, while they're what Jan Hart would call adolescents, and think them over.
I especially need to figure out how I'm going to treat/achieve the network of very fine branches. May draw them in with a bamboo pen nib; or perhaps add as the very last step with a water soluble lead pencil, blurring some lines and leaving other sharp.
May need to attempt some studies of just such tracery before proceeding.