Okay so I did some more testing. I tested this in both a blueprint project and a C++ project.
- Created new clean 4.12 project.
- Created 2 post process volumes.
- When transitioning to one post process volume from another that has a different cubemap to the prior, the editor freezes.
This is why my project was unable to load from the start, because the last location of the editors camera was inside one of the conflicting post process volumes. So upon loading the level, i would have a freeze.
So i guess there’s no need for me to send any project now as my problem isn’t specific to this project.
Now is this a known issue or is it only me? I have tried reinstalling the engine several times already and I have never had any issues with versions before 4.12.