Map bug and flickering shadows at Delta

[dscharrer]

After getting out of the crashed shuttle at Site Delta, turn around and walk to the edge of the plateau, then turn left and follow the edge past the huge pipe to find some jagged edges in the terrain and bit of missing geometry at the end:



Additionally, all around Site Delta there are occasionally flickering shadows on the ground. Here are two consecutive frames (taken from an apitrace of the game) right after getting out of the shuttle:


These "bad" shadows always appear in the same frames when re-running the trace.

I played the game using the open-source radeonsi driver but can reproduce both issues with AMD's proprietary Catalyst drivers (version 15.9) - in game and with the apitrace recorded while using radeonsi. I have attached the hpl.log for both drivers.

GPU: Radeon HD 7950 (3GB VRAM)
Driver version: Mesa git master with LLVM svn, or Catalyst 15.9

I verified the game files in Steam and there were no errors.

The flickering shadows seem to be limited to Site Delta and I did not notice any glitches elsewhere in the game.

Thanks for making an(other) awesome game and continuing to support Linux!