Black screen when taking damage

Pre update, I could not see my character when pressing TAB.
Now, the screen is black for either a few seconds, or until I die.
This means I can’t fight, can’t run in snow, swim or check out rad sites. Even animals made me kill myself.

http://s11.postimg.org/4l68b8w9v/Rustfail.png

Any ideas how to fix this?