Environment maps in ebony cuirass and HiRez Armors Indoril cuirass don't work

MCP bump maps support was added with https://github.com/OpenMW/openmw/pull/2714.

Morrowind

Testing HiREz Armors (https://www.nexusmods.com/morrowind/mods/47919) I've found that only on OpenMW the cuirasses don't have that metalic effect.

OpenMW

Linux Mint 64 bits

Daily 0.45.0+git202005121534~ubuntu18.04.1