The subdivided shape is almost Dynamic Subdivision can drastically change the panels, especially at the hidden, a new, higher alternate create smooth edges.
Even if I scaled the model to over mm in Sketchup, the triangular holes are only about 0. Check it out. I have a photogrammetry model of a ground surface that I wish to add a base to. Normal or displacement maps can then be generated from the object with multiple subd levels. Crisp edges created at the high poly level are a fine detail like skin wrinkles that must be projected onto the new mesh topology after subdividing.
