When doing a painting it is often a good idea to study the details to make magic happen. The tree from a distance seems to be gray, but when looked at closer the other colors seen bring light and shadow. Texture is created and interest added with the reddish brown shades you see in the closeup of the bark. Daniel Smith Quinacridone Sienna watercolor might be a good one to use to add a spark to a watercolor painting of this tree.
Sometimes the sun is at a perfect angle to create its own art piece. With a slight angle of the camera, the lines create interest while the sun plays tricks with the grain in the wood adding an eye to the swan like shape. It is the light and dark colors that make monochromatic photos sing.
Fascinating light show on wall. Is this a reflection or refraction from an unknown source? Never saw this before and haven’t see it since. The light put on quite a show as it danced across the space. The bay window could be the cause of the delightful image.