Note : This guide requires the Rhino WIP . This is a work in progress meaning that it is meant for testing and should not be used for project critical production work. The Rhino WIP is available to anyone that owns Rhino 8. USD files can now be used to encode information for the exchange of BIM info…

I’ve tried to export 25 identical blocks to a *.usdz file and it failed until I added a mesh box next to the blocks. Unfortunately I only see one of the blocks and not all instances. Also the blocks actually contain breps and I’m unsure if I need to mesh the geometry before exporting. Another issu…

25 identical blocks should create 25 instances, but only one extra external file. USDZ format is a zipped format. I have not done this, but rename it .zip and see what is inside it. USDA is an ascii text format USDC is a binary format I believe. Both USDA and USDC should have the external block…

I opened the file in iRhino and all I see is a mesh box and one instance of my block. This is my test file: box and 25 blocks.3dm (222.4 KB) And an export: m6x50-cap.usdz (181.5 KB)

I see the issue with a pure block model. It does take an object in there. I will get these on the list to fix.

My goal is to export a couple thousand block instances scaled to different lengths and with a selection of colors… [image] At the moment each wire you can see is one mesh pipe. All meshes are disjoint.

Those looks great. What a great test for this.

[image] Martin Siegrist: My goal is to export a couple thousand block instances scaled to different lengths and with a selection of colors… Thanks for all the bug reports so far, keep 'em coming. If you have a sample file with something like that I’d love to stress test!

Latest 9 WIP installed this morning. I exported an art piece containing 296 blocks and 24 polysurfaces. The 296 blocks are 24 blocks with multiple instances. [image] [image] The *.usdz file contains just one block when the polysurfaces are not part of the export and just one instance of each …

Here’s my attempt to create a better example file: test-usdz.gh (48.1 KB) test-usdz-9.3dm (342.2 KB) [image] The goal is to have a lightweight *.usdz file with just two meshes instead of hundreds of meshes. The next step would be to have more individual colors. test-usdz-9.3dm (342.2 KB) tes…

Rhino WIP Feature: USD File I/O Improvements

Serengeti (Rhino WIP)

brian (Brian Gillespie) August 13, 2025, 3:39am 8

RH-88697 is fixed in Rhino WIP

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Rhino WIP Feature: USD File I/O Improvements

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