This is just a patch to fix a nasty softlock that's been looming for quite some time!
I finally was able to get it to happen myself... Sorry it took so long!
- Fixed a white-screen bug that soft-locked and crashed games that were set with Global Illumination on/High/Very High settings after finishing a map
1.0 Hotfix/Micro patch 4
Source: Steam Community (opens in a new tab)