rdLODtools Tutorial 7 – Fixing broken Materials after re-installing.

Last Updated: 16th August 2025

I had a customer experience a problem where after re-installing UE4.27 and the rdLODtools plugin, the main material for billboards already created previously were broken.

I’ve traced the issue down to a problem with links to material functions being broken – they should be pointing to your local copy of the functions in your project/rdLODtools/ folder but they are somehow getting redirected to the original copies of the functions residing in the actual rdLODtools plugin folder.

Until I can work out a fix for this, here is how to fix up those “missing material functions”.

Step 1. Check all the files are there.

Your project should have a folder called “rdTools/System/rdLOD/” in the root, i.e “/Game/rdTools/System/rdLOD”.

If that folder does not exist, all you will need to do is create a billboard for any mesh – that will copy all the files to that folder, and fix any existing billboards you have previously created.

If it does exist, check that the “MaterialFunctions” folder in there contains the following files:

If any or all of those files are missing, or materials aren’t linking – you can do a reset by deleting the “rdTools/System/rdLOD/” folder – you may get some warnings, but ignore them as copying them back over fixes it. Then just go to create any type of billboard LOD – the files will be copied from the plugin system folder.

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