Good idea! Thanks.
So, I did check the 18-Hour log and the last line was this (or something similar):
[2021.04.03-01.12AMSTART][ 0]LogMaterial: Display: Missing cached shader map for material WorldGridMaterial, compiling. Is special engine material.
The WorldGidMaterial was compiling.
Before the OP, I did try to launch again, but gave up after about 5 minutes. That’s actually the log posted above. Looking at this new log, I discovered the editor got a bit further:
[2021.04.03-01.37.36:639][ 0]LogMaterial: Display: Missing cached shader map for material WorldGridMaterial, compiling. Is special engine material.
[2021.04.03-01.37.38:565][ 0]LogPackageName: Warning: Asset path "S_ClothTarps_03.SM.Mesh.S_ClothTarps_03" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
[2021.04.03-01.37.38:565][ 0]LogPackageName: Warning: Please consider resaving package in order to speed-up loading.
[2021.04.03-01.37.39:117][ 0]LogPackageName: SearchForPackageOnDisk took 0.173s, but failed to resolve S_ClothTarps_03.
[2021.04.03-01.37.39:117][ 0]LogPackageName: Warning: Asset path "S_ClothTarps_03.SM.Mesh.S_ClothTarps_03" could not be resolved.
One thing to note, the local data cache path is still [C:USERPATH]/AppData/Local/UnrealEngine/Common/DerivedDataCache
Near the end, there seems to be a complaint:
[2021.04.03-01.37.35:550][ 0]LogDerivedDataCache: Shared data cache path not found in *engine.ini, will not use an Shared cache.
[2021.04.03-01.37.35:550][ 0]LogDerivedDataCache: Unable to find inner node Shared for hierarchical cache Hierarchy.
Maybe I need to add a data cache path?
Anyhow, I’m going to review the config files and then try again.