How to: https://youtu.be/hS-Nx71ot-c
Filter maps without lose the node material. Material editor quick tools. Pick Material or face selection material only. Random UV / Show hide maps. Editable poly, attach selecteds or make group a single object / attach by materials / detach by materials. Reset xform / pivots / Condense repeated materials. Export selected object + maps / Bake Maps (rendermap). Convert Corona scenes to: Chaos Vantage + Unreal Engine + Blender etc... Random extrude / Scene management tools.
Converters works with Corona Physical Materials. Min. Requirements: 3dsMax 2021 / Corona 7 / Vray 6 / Scatter.