Last Saturday

Anyone who reads these posts knows that my sketch group heads inside when the weather is inclement. But on sunny days, even if it's cold, we long for the bright light and contrasts of working outside. Last weekend it was that sort of day. Nobody wanted to be inside, even though the high that day was mid-30s. After some discussion we decided to go to Ray Drive, which runs along the eastern shore of the Des Moines Rive, giving great views of the city skyline, riverside parks, and the Botanical Center. 

"Botanical Center," wc/ink on paper, 5x9.2

This is the geodesic dome of the Botanical Center, which is sited east of the river. I thought the near evergreens (left) and the thinner ones to the east of the dome made an interesting composition. I parked in the lot and stood alongside my car to sketch the scene in graphite in one of my sketchbooks. The bright sun was just over my left shoulder. The dome's dark but transparent panels make a repetitive patter that seems to swirl around its circumference, and in the lower center enough light is reflected back to us to give a sense of the interior below. 

After I did a reasonably detailed drawing, trying to give the sense of those curved panels, I jumped in the car to paint. The dark values were particularly important, requiring several layers to achieve the right depth.