Some more openPBR example mtlx file that support texture maps?

[RichardBaoRepo]

as we could saw in the standard surface example, it provide a complete examples set that include how texture maps were used. but in openPBR's examples, only a few basic ones were included. i spend some time to try how it work but still not sure how do i get it correct. it would be really nice to include those example if its possible. thanks

[portsmouth]

@RichardBaoRepo Which examples were you thinking of, can you link to them?