Sorry, but I'm at a point in my process on image 3 where I need to do a bit of rules lawyering
Can we:
-Weld vertices for reasons of memory management
-Subdivide or unsubdivide the mesh
-Assign different materials to different polygons in an object
-Manually subdivide the mesh for materials assignments
-Use a "cutout" shader function (e.g., makes holes in areas by making material opacity 0)
-Use phonging to make the curves smooth