Rhino 8 usdz export shows material with rounded corners

When exporting usdz in Rhino 8, the material is shown with rounded corners for some reason. I tested with a simple cube. When you export to fbx and then convert to usdz outside of Rhino, the material is shown correctly. Is there something that I need to adjust to export the usdz file without the strange rounded corners?

Here is the comparison (quick look on mac):


Above is direct usdz export from Rhino 8


and here is the converted usdz from Rhino fbx export.

I’m not initially sure @sakdt, but I’ve created a ticket for me to look into this.

https://mcneel.myjetbrains.com/youtrack/issue/RH-86484/Rhino-8-usdz-export-shows-material-with-rounded-corners

Same symptom here - exporting any USDZ from Rhino causes the ‘rounded face’ problem after dropping in a rhino-exported USDZ in Keynote for Mac, but importing the files into Reality Converter and re-exporting a USDZ from there does not exhibit the symptom after importing back to Keynote, at least for small files. Re-importing the USDZ exported file back into Rhino again does not exhibit the system (geometry looks normal, except for texture mapping scale).

Reality Converter also notes a warning in the Rhino UDSZ exported file format “The root layer of the package must be a usdc file and must not include any external dependencies that participate in stage composition.”

Material & lighting also seem off from render mode in Rhnio vs how products are displayed in Keynote, and didn’t find export options to configure USDZ export in Rhino.

JetBrains link above seems broken.

Insights welcome, thanks!

It is not broken, visibility was just not set to public. I just changed that so you can view it.

I have experienced the same issue: Export rounds all the edges of the model. Either there is some additional setting or this is a glitch. Or, maybe, NURBS is the problem? Does the Rhino geometry have to be converted to Mesh first before the UDSz?

No. There’s an issue in the USD exporter that causes this. It should be resolved in the Rhino 9 WIP.

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Thanks for that @CallumSykes . One thing I tested that I found interesting was importing the USDz exported from Rhino into SketchUp. There everything appeared to be correct. If the geometry had been corrupted or damaged by Rhino’s export, I would have expected it to be so in SketchUp as well. Any thoughts? Also, sorry for mentioning SketchUp here :wink:

The geometry is all good, it’s a missing attribute in the USD so USD viewers won’t render it correctly, they make rectangles as ellipses, not really sure why it’s a thing, but I would expect geometry to import anywhere normally :slight_smile:

@CallumSykes , I came across this trying to export a Rhino model for use in Morpholio Trace. Their importer returns the rounded face issue, but the SketchUp importer doesn’t. Nor does the export from SketchUp that originally came from Rhino. Anyway, I think you helped me understand what is happening. Thanks!

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