About the glass reflection performance problem,
I just want to confirm that it seems related to a shader (disabling one specific shader solves the problem).
It's used in :
- the screen of the missions consoles
- the shop windows
- some settlement windows
- glasses in the bar
- some transparent red colored panels in the concourse "guardrails"
The GPU usage climbs the closer you are to the source of the problem (and looking at it).
Disabling that shader solves the fps problem. Side effect is liquids disappear in glasses, some symbols are removed from the shop windows, etc.
About the performance gain, if i'm close to a shop window, GPU usage drops from 100% to 65% (Nvidia GTX 1080).
I can provide more infos and screenshots if needed.