Odd graphical glitches - 2013 Mac Pro

[Guest]

You could try a temporary manual solution if you would like
Rename the undergrowth folder in the game folder to _undergrowth. This will disable rendering of the terrain vegetation (which it looks like is the problem)

Thanks mate! That works!!

For Mac users, you can right click soma on steam, click "properties" and find browse local file to locate soma files on your mac and change the file name!