An external image texture reference (IfcImageTexture, #1781). The viewer resolves url against the .ifcZIP sibling images (basename match) and decodes it ONCE per textureId — meshes only carry this lightweight ref.
IfcImageTexture
url
.ifcZIP
textureId
Sampler wrap from IfcSurfaceTexture.RepeatS/RepeatT (true = repeat).
IfcSurfaceTexture.RepeatS/RepeatT
Stable dedup key: the IfcSurfaceTexture express id.
IfcSurfaceTexture
IfcImageTexture.URLReference verbatim (usually a relative filename).
IfcImageTexture.URLReference
An external image texture reference (
IfcImageTexture, #1781). The viewer resolvesurlagainst the.ifcZIPsibling images (basename match) and decodes it ONCE pertextureId— meshes only carry this lightweight ref.