First, the sketch I drew in pencil, then defined with mars black acrylic:
You can just barely see the pencil lines where I divided the surface into three sections vertically and horizontally; this one had a lot of nice strong shapes, and I wanted to get the relationships and relative sizes just right.
Below is the ever-popular wild-amd-crazy-colored underpainting, blocked in with various mixtures of cadmium orange, magenta, phthalo blue, and titanium white. That vivid red I made by mixing strong glazes of the orange and magenta.
Except for the river, I decided on these under colors by choosing (roughly) the complement of what the main finished color of each area will be.
Curious as to how it will turn out?