Pete, Di,
I see dried cracked earth. And to explain, earth generally dries and cracks with 3 lines radiating from the node. So an average angle of 120°, which is what you've achieved here. That along with the rough texture and colour, if it's to be a wall, it must be an Adobe Wall.
And that's what I've missed about the work you produce in your collaborations, it does not have to be right, but it does have to be trying to do something new.