Right then.
I have a UVed mesh in Max (it was created from scratch in Max, not brought in from Zb initially).
If I export from Max as .obj, Import into Zb, Subdivide, Delete Lower subdiv levels, then Reconstruct Subdivision, it works as expected.
But if I GoZ it from Max into Zb then Subdivide, Delete Lower subdiv levels, then Reconstruct Subdivision, it fails to reconstruct subdivision.
How is it even possible for Reconstruct Subdivision to fail when it was a ZBrush subdivision in the first place, and must therefore be all quads?
Any thoughts? Or should I just file this under “annoying quirks” for future reference?