I enabled Global clip plane checkbox to true for Planar Reflections, got a message that engine needs to restart. But when I try to start engine it won’t load anymore and gets stuck during initializing phase at 45%.
After setting back r.AllowGlobalClipPlane value to False in DefaultEngine.ini everything workds fine.
Tried several times with other projects, and each time when i set GlobalClipPlane flag to True engine gets stuck at “Initializing 45%”. Setting it back to False in .ini file makes engine load properly.
I was able to test and verify this issue on my end, and have entered a bug report for this issue (UE-30348). The editor will eventually load, but you have to wait quite some time. I made sure to mention in the title of the bug that it hangs/freezes when enabling this option.
Once the fix has been made it will be added into an upcoming full engine release or hotfix, and added to the list of known/fixed issues. If you have further questions or need additional assistance, please let me know.
It will, you just have to give it some time. I just tried, and it was stuck at 45% for around 5 minutes, and then it loaded. It has to recompile all shaders.
I just had this exact same issue in UE 5 today. Except I have reverted the change in the DefaultEngine.ini to r.AllowGlobalClipPlane=False and the editor is still hanging on startup after 30 minutes. This will be an expensive lesson if it does not load as I have 4 days of work already in this project.