Gap in boundary edges · Creative 3D Community

Gap in boundary edges

I am using Plasticity Indie (26.1.3) and am tasked with creating some 3D logos from Illustrator files. So I have exported them as SVG (seems like an easy choice, let me know if that was a bad move), but I'm having a bad time in Plasticity trying to extrude the various shapes (and there are a LOT of them, especially in one file). Non-manifold geo seems to be the main culprit.

With extreme zooming in Plasticity, I have found two of the issues so far - one shape is not really "closed" in Plasticity. The first and last points are very very close together (I had to zoom very closely to even see it), but apparently not connected. However, when I zoom to the max in Illustrator (64k%), the points are still right on top of each other, and if I move one of them, they ARE connected. Why does Plasticity see them as unconnected? If I select both points in Plasticity and Bridge them, that gives me a whole, uninterrupted curve, but it still won't extrude as a solid (only a sheet/outline). "Find boundary edges" does nothing. How can I debug something like this? I am a beginner here, trying to learn, but it is hard to google something like this when I don't know what I am fighting against.

The other issue seems to be that at about the same zoom levels, some curves have a "twist", like if you take a square consisting of two points, and the two top points swap positions, you would have a "twist" in the middle with infinite "thinness" at the twist point, which I guess stops any attempt at extrusion. Is there a way to detect these? Again, "Find boundary edges" does not seem to find anything.

I am sure these things can be handled in Plasticity, but I don't know how to go about it. And my understanding of Illustrator is even worse than my Plasticity skills.. Does anyone know how to get around this? It probably IS easy once you know how..

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Gap in boundary edges