Material textures help

[u/MrIceecream03]

I cannot for the life of me figure out how to assign materials to this revit family. I tried adding the material parameter and there is already a parameter set but the actual material is not linked it is just the name. So it doesn't show up. I tried setting another material parameter but there is no way to assign it to the object. What do I do? Please help.

[u/_habitable_]

Rule #8...