Incorrect material.side values when loading with example project

[elunty]

Sample IFC: https://github.com/mrdoob/three.js/blob/dev/examples/models/ifc/rac_advanced_sample_project.ifc

Loading with default settings:

With "use fragments" turned on:

You'll notice that most of the materials are rendering wrongly, but i think the material.side is just sent incorrectly (for whatever reason). If you go inside the building, it renders properly from inside:

[elunty]

closing issue and moving to web-ifc-three