After updating to 4.18.2 yesterday every time I load any of my levels that contain a landscape the shaders have to recompile. I can mostly ignore the issue and continue working on other things but if I want to modify a material it has to wait until all shaders are compiled before it updates/saves (I assume because the compiler uses a queue so my new changes happen after the landscape’s).
I wasn’t able to figure out repro steps for this but I was able to remove all the content/code from my project except the landscape and its relevant textures/materials. Uploaded the zip to my dropbox.
I just ran into this problem.Changing something in the landscape material (I removed a unused node) and then saved the material. This seems to have worked for me.
Didn’t actually try this solution because I had seen that over in the forums an Epic dev said to delete your derived data cache at “AppData\Local\UnrealEngine\Common\DerivedDataCache” which fixed it for me. So if anyone else has this problem and the above doesn’t work try that as well.