I am trying to make a 3D graphic using Illustrator. The graphic is supposed to consist of a cuboidal structure that is bent in some regions. I have been able to make the graphic by first making the 2D version using a rectangle (empty fill, 2 pt stroke, and then used the direct selection tool to use the rounded corner feature). After that, I used the extrude & bevel function to make it 3D.

However, I am seeing what are seemingly strange artifacts (see picture below). Would anyone here know what those are, why they appear and how I might get rid of them?

enter image description here I've already tried 'View on CPU/GPU' as well as tried exporting it to .PNG/.PDF and it appears in both. Any help would be highly appreciated. Thanks!

EDIT: I figured out that those lines appear only when I render the 3D graphic as a vector. When I rasterize it instead, I no longer see those lines. While this solves my problem for the moment, I'd appreciate any insight into how to avoid this problem while still rendering it as a vector graphic.

  • I'm not familiar really with the new implementation of 3D within Illustrator, but in the past, a slight rotation of 1° or 2° in any direction often eliminated odd artifacts, or would cause a missing face to finally be drawn.
    – Scott
    May 3, 2023 at 17:31
  • @Scott I'll keep that in mind, thank you.
    – optnon
    May 4, 2023 at 20:29


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