SUM SURFACE
Curve construction
Sum surface function adds the height of each X,Y curve together to form a surface
The surface is scaled down, then lofted with the base square curve array to form the sidewalls
Construct a square array.
Find the X,Y edges, then divide the curves.
Displace the points on the curve by a small randomizing amount.
Randomly raise these points.
Interpolate these points into curves on the X and Y axes.
Use the Sum Surface algorithm to construct the surfaces.
Loft these surface edges to the base plane to close the figure sides.
Smooth the geometry using Tri-Remesh.