Load roughness and metalness texture from specular map for FBX #911

Job	Run time
macos-13 / Release / homebrew-clang	27m 47s
windows-2019 / Release / cl	37m 37s
macos-13 / Debug / homebrew-clang	19m 7s
ubuntu-22.04 / Release / gcc-11	18m 54s
windows-2019 / Release / clang	34m 31s
ubuntu-22.04 / Debug / gcc-11	17m 5s
windows-2019 / Release / clang-cl	40m 36s
ubuntu-22.04 / Release / gcc-12	21m 38s
windows-2019 / Debug / cl	30m 30s
ubuntu-22.04 / Debug / gcc-12	19m 2s
windows-2019 / Debug / clang	34m 54s
windows-2019 / Debug / clang-cl	37m 37s
ubuntu-22.04 / Release / gcc-13	28m 12s
windows-2022 / Release / cl	43m 9s
ubuntu-22.04 / Debug / gcc-13	24m 30s
windows-2022 / Release / clang	39m 18s
ubuntu-22.04 / Release / clang-14	19m 0s
windows-2022 / Release / clang-cl	37m 23s
ubuntu-22.04 / Debug / clang-14	15m 14s
windows-2022 / Debug / cl	29m 4s
ubuntu-22.04 / Release / clang-15	18m 54s
windows-2022 / Debug / clang	34m 40s
ubuntu-22.04 / Debug / clang-15	15m 37s
windows-2022 / Debug / clang-cl	31m 22s
ubuntu-22.04 / Release / clang-16	19m 11s
ubuntu-22.04 / Debug / clang-16	16m 6s
ubuntu-22.04 / Release / clang-17	28m 26s
ubuntu-22.04 / Debug / clang-17	22m 24s
	12h 41m 48s

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