OptionalmaterialOptional non-texture material parameters merged into the
generated SceneMaterial. Useful for transparent dielectrics
(windows, curtain wall) where opacity and alphaMode matter,
for adding a per-type colour multiplier, and for tagging the
material with an engineering hatch pattern (consumed by the
section-plane cap pass and the Detailed-mode hatched body
shading — view.effects.bodyHatch).
OptionalalphaMode?: "OPAQUE" | "MASK" | "BLEND"Optionalcolor?: [number, number, number]OptionalhatchPattern?: HatchStyle | HatchParamsANSI / ISO hatch convention for the IFC type, applied to the section-plane cap and (in DetailedRender) overlaid on the body. Accepts either a named style or full params. Realistic mode ignores it and renders PBR.
Optionalopacity?: numberPainter producing the MaterialMaps triple for this IFC type. Receives the requested texture size in pixels (square).
Painter + optional material-parameter override for a single IFC type.
Used as the value type in DEFAULT_IFC_PAINTERS and in the
paintersoverride map accepted by applyIFCMaterials.