Hey there @G53441733! This is an unfortunate side effect of many operating systems (and languages, compilers, and well computers file systems in general) having various limits to the length a files path can be. For older windows, this was 256 characters for the full path of a file before it starts causing issues, and the cap can be raised, however in multiple softwares this feature must also be enabled. It’s extremely recommended to keep all file names as succinct as possible, because some deeper nested files (especially with things like One file per actor that World Partition utilizes) get hash like naming conventions which get quite long. This is likely what’s occurring with your shaders if I had to guess.