I used this foundation in this manner to see what would happen with geometric shapes. I could make straight lines along the edges you see. There was something under the small box so I could still stay within my rule of using straight lines.
This is not finished. Another rule for this one was I would do design work, meaning fancy black lines, with curls, tree-like roots.
The pinkish-brown bled into the blue. I am not sure what pastels I will go for.
The yellow rings are interesting to me. Not sure what I will do with those.
There is one possible “line” to make. It is located at the top and would come off the line anchored to the upper right corner, which heads towards the middle. The is a crumbly area just ahead of it where the line ends. This possibility heads off toward the left upper corner. It’s a darker narrow tint. There is also a C shape tint. A similar curved line cuts across the forward rectangle with the hole cut out of it. the one with the brown piece of “wood”.
It may be I can play with that rough area at the top, and make it become something growing like moss there.
What do you see? What would you do?