Help - Bunker Graphics Corrupted with Either Real or Dynamic Enviroment Mods

[Eugene]

I've looked through the threads for Real and Dynamic Mods, and several other threads as well, without seeing similar posts for help for this problem:

Stock SH5 runs normally, for the tutorial and for single missions. When I start a new campaign with MMM's Dynamic Environment (the standalone Part 1) enabled, or Real Environment Rev3, and nothing else enabled, the entire screen is corrupted. It's mostly white, usually with large horizontal lines of several words (enlarged from this forum, sometimes!). I can just make out the Bunker scene behind this overlay, and can move around but not so much as to be useful.

Without the mods, the Bunker is normal. And on patrol, with either mod enabled, the sea and sky are gorgeous.

Can anyone suggest how to fix this?

I've wondered whether I can begin a campaign without an environment mod, and once on patrol save and then enable the mod. But this sounds desperate and possibly leads to other problems?

My specs are below in signature. Thank you for any help on this!

Eugene