My game kept crashing when I had mirrors enabled, I didn't have the support for that shader version on my card. But that looks like it's a problem with the mod itself. I don't know, try re-downloading it, or check to see if other people at the website of the mod get it, by looking at the forums or something.

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"Yeah, hit squad is in the house! All right baby! 60 minutes, balls out.
Let's open up the whole can of kick ass and kill 'em all!
Let the paramedics sort 'em out!"
Alvin Mack from The Program