Is it possible to group/join meshes by material? I have a model generated from ifc. However throughout the generation process, it's separated all the meshes into individual ones. Is it possible to merge them by materials? Like merge all meshes that use material ifcWallStandardCase for example.
Cheers :)
Join all the mesh objects with Ctrl +  J (or type in Join after pressing  F3)

Then separate them by material with  P while in Edit Mode.

That should give you the result you seek.