I see that the whole per system has changed in the 3.0 Beta... A few things I noticed (I know its still in beta, but wanted to point things out)
... First there is no lightmapTexture anymore on the new base pbr, metallic or specular materials... This is a must have for baked shadows... right???
... Maybe its just not that far yet...
and serialization and deserialization is not working at all... when trying to serialize get no serialization function for material error and deserialization just does nothing...
But to work fine creating from code...
Si I guess I'm just letting the big dogs @Deltakosh @Sebavan and @RaananW know about these few issues so far