well this is weird…
I finally got a chance to test this.
I made a simple project - with starter content
and in the project directory I have:
save and close
if I make a Directory called Textures manually and open the project I get a folder called Textures, that is empty.
save and close
if I add a texture to that directory manually and open the project I get a dialog telling me "Importing new asset /Game/Textures/textureTest.png
and it’s visible in the Content Browser in the Textures folder
if I look in the Content — Textures folder on disk I find the following: textureTest.png (2.9MB) and a file called textureTest.uasset (3.3MB) - interestingly if I then delete textureTest.png, opening the editor prompts me to confirm that I want to delete this asset - if I say yes it deletes the textureTest.uasset file but if I choose Cancel - it doesn’t it just leaves the textureTest.uasset and I can presumably go on with my life.
so it seems to me that manually adding files to the correct directory structure will auto-reimport them - note the ‘re-import’
and then you’ll have to go in and clean up all the duplicates…
I can’t find any information on what the directories should be called or what structure they should be in in order for the engine to properly find them - this is alluded to in the tool tip for Edit > Editor Preferences > Loading & Saving > Monitor Content Directories “Note that source content must reside in one of the monitored directories to be eligible for auto-reimport”
so I think that if you set up your directory structure in the same way the engine wants you to (??) then you should be able to import whatever you want.
I have a feeling that the FBX files you mention might have materials assigned - and I think those materials (and associated textures) might get re-re-imported - so they will end all in the same folder…
there must be a proper way to do this…I can’t imagine a real game studio would tolerate that kind of workflow…