unwrapIfcZip variant that ALSO extracts sibling raster images (#1781) —
the packaging convention for textured IFC (IfcImageTexture.URLReference
is a relative filename, the image ships next to the .ifc inside the
.ifcZIP). Non-zip input returns unchanged bytes and an empty map, so
callers can invoke this unconditionally like unwrapIfcZip.
unwrapIfcZipvariant that ALSO extracts sibling raster images (#1781) — the packaging convention for textured IFC (IfcImageTexture.URLReferenceis a relative filename, the image ships next to the.ifcinside the.ifcZIP). Non-zip input returns unchanged bytes and an empty map, so callers can invoke this unconditionally likeunwrapIfcZip.