the walls in the second image are a terrin flipped onto its side. Triangular geometry with intentional or whimsical rises and falls - only you can decide that.
Try making a mesh with nodes set out on a grid, use the mesh to roof tool to interpret them as individual roof planes. Image the resulting roof planes in the 3D window such that they are seen in what you conceive to be the plan view. Save this as an object from the 3D window.
Rinse. Repeat.
Think Like a Spec Writer
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