Hey, that is great summary, thanks for sharing! I didn’t know Source engine includes its own version of MetaHuman plugin (under Experimental path). Indeed there is no source code included as well, Epic just decided to go full binary way..
That will be useful to know for all folks playing with Source engines.
My point was about copying Epic’s Marketplace version of MetaHuman to Source Engine → not sure it will work due to reasons mentioned above (binaries incompatibilities being the root cause).
In case of using Epic’s MetaHuman version of the plugin from EXPERIMENTAL directory → that should work I believe.