topic Re: USD export you lose FR4 in Fusion Electronics Forum

USD export you lose FR4

JohnLauer_Adom — Sat, 10 May 2025 12:29:56 GMT

For a 3D PCB like this...

When you try to export to USD

You get this warning in the export dialog:

This error is a significant problem when exporting a PCB because it turns the green FR4 into a black material. The problem is worse because with the mapping Fusion chose to use, other items use Steel Satin too, so there's nothing uniquely identifiable about the FR4 layer anymore so you can't even create a script to remap back to FR4 afterwards.

My suggestion would be to at least map it to a supported appearance in a USD that is close to the green color and give it a name that can be run through a script to remap to an alternate material on the back-end.

This is how it looks in Blender. The FR4 turns black.

Of course another problem that's been going on forever is you don't see the silkscreen legend either because Fusion doesn't export the canvas to a USD. This would be another welcome feature.

Re: USD export you lose FR4

jorge_garcia — Mon, 12 May 2025 16:40:48 GMT

Hi @JohnLauer_Adom,

I hope you're doing well. This seems like a general limitation of the USD export in Fusion. It seems like the decals don't go out in the export.

I'll take this to developers to see who is in charge of this and what can be done.

Let me know if there's anything else I can do for you.

Best Regards,

Re: USD export you lose FR4

colbyMZFJ8 — Fri, 17 Oct 2025 16:07:09 GMT

Hi @JohnLauer_Adom ,

I just discovered today that this has been fixed. I couldn't seem to find any information about when it was fixed, but it seems to be good to go now.