Black small Mirror issue

[Raymond7cn]

Dear Specialists, I encountered one issue when helped a friend to adjust the Mirror for a mod Truck (Mack B61 1953), he couldn't see the entire Mirror with his FOV and the Mirror goes too dark at night, so at beginning, I just scaled the Mirror's model in Blender,

It's ok there, Then I solved the dark issue by deleting a line in def file. "hide_in: 0x7E00", However when I wanted to add a small Mirror according to the Peterbilt 389's (close_s_mirror_reflection), It's totally black or to say has no reflection in game:

Then I checked again in Blender contrast it with 389's, There is no difference between two of them other than the mesh's size and coordinates, and no errors in game.log as well, Besides, I found that it could has reflection as the Normal mirror above after I changed the reflection texture to close_mirror_reflection.tobj, so I'm totally confused, what's the problem? what's the principle of these reflection.tobj in the background? TIA!!

Sincerely,
-- Raymond

[Raymond7cn]

I changed the Interior model to Peterbilt 389's directly, the close small mirror still was black, still don't know what's going wrong there.