Thanks for the snapshot UncleRichardson. Much obliged.
I remember this happening in normal Renegade, I'm used to it Just kidding.
That said, I wonder if someone placed a nuke beacon in a similar circumstance last game when I simply couldn't find it outside the Tiberium Refinery. As far as I know the building isn't climbable, but I looked all around where it was chiming and simply couldn't see it. At least I know what to look for -- I was hoping Renegade X would add a little periodic flash, or flicker, or at least something to distinguish beacons. In my opinion, the difficulty should be on protecting it, not on defenders trying to compare shades of gray to see if that's building texture or beacon texture.