Post Process Volume Not Working

Summary

UE 5.6 - Post Process Volume does nothing - but Color Correction Window / Region works. I’ve tried all the obvious stuff, the Post Process Volume is enabled, blend weight is 1.0, infinite extent (unbound checked), set priority to 1 up to 100, tried lit and unlit mode, made sure post processing effects are enabled through viewport. No matter what, the Post Process Volume does nothing. But a Color Correction Window will instantly work. I just want to be able to post process the entire level globally, not selected regions.

What Type of Bug are you experiencing?

Rendering (Graphics / Niagara)

Steps to Reproduce

  1. Add Post Process Volume
  2. Change Saturation to 0.
  3. Nothing happens.

Expected Result

Saturation should go to 0 / everything becomes grayscale.

Observed Result

Nothing.

Affects Versions

5.6

Platform(s)

Windows