OptionalmetalBare-metal F0. Default [0.58, 0.58, 0.60] (cool steel grey).
OptionalmetalRoughness on bare-metal regions. Default 0.30.
OptionalnoisePeriod of the rust-mask fBm in lattice cells. Default 4.
OptionalnormalheightToNormal strength. Default 1.6 (deep pitting on rust).
OptionalrustDeep-rust albedo. Default [0.42, 0.18, 0.07].
OptionalrustCoverage in [0..1]. Higher → more rust. Threshold applied to the
normalised fBm mask. Default 0.55.
OptionalrustBright-rust accent (oxidised flake highlight). Default [0.78, 0.36, 0.14].
OptionalrustRoughness on rusted regions. Default 0.95 (matte oxide).
Options accepted by paintRustyMetal.