usdz converter double sided material

I am using usdz converter from xcode 10 to convert obj into usdz format, but it does not have double sided material option. Is it possible to set double side for material in usdz format?

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I have the same problem. The only fix I can find it duplicating the geometry and flipping the normals.

While this works it's inefficent and would be a bigger problem on say, a waving flag.

Has anybody found a fix for the double sided plane material apart from duplication the plane? We really need an optimised, best practice solution for this problem.
I have the same problem) Try to set "double sided" material in Reality composer