How to release memory while importing the big asset using c++?

[RecourseDesign]

Are you doing a Package->Unload() as well as destroying your textures?

Also, the garbage collection may not have had time to delete the memory:

Force Garbage Collection

Dear Chris, The title of your thread, in World.h #Running When You Want You could run it on a timer //void ForceGarbageCollection( bool bFullPurge = false ); //I use True GetWorld()->ForceGarbageCollection(true); #Crashes Solution → IsVallidLowLevel() For actors that could be garage collected, you can do this check if(!Actor->IsValidLowLevel()) return; //dont try to access null or is-being-destroyed Actor->DoStuff(); I find that catches a lot of what would …