Mystifying F360 Rendering Glitch

[tattooedbear5801]

I am getting a "random" chunk of geometry appearing in the final exported rendering that doesn't appear until the model is rendered. I have examined every piece of this file from source file in Adobe Illustrator, to imported dxf sketch, to extrusion, to settings, and I see nothing out of the ordinary - in fact, I followed exactly the same process as I have with several hundred other designs. I've included screen shots for reference. Any thoughts? Assembled In Rendering EnvironmentRenderedExtruded SketchSketch Selected for Extrusion

[jeff_strater · Accepted solution]

looks like a faceting issue.  Can you share your model here?  One thing to try, change the Display Detail Control, set it to "Fixed", and try one of the 3 choices there.

[tattooedbear5801]

Thank you! That corrected the glitch. So I am guessing that the rendering engine reads the geometry in a different way than the working renderer. Those probably aren't the correct terms. What does changing the display detail control setting change in regards to how the software reads the geometry in relation to the rendering output? 

[jeff_strater]

It's not so much "reading the geometry in a different way" as it is that, likely, the renderer and the in-scene graphics are using different settings for the equivalent of the "display detail control" to set different parameters on the facets produced.  My guess is the renderer uses a much more dense mesh ("high" on the detail control, or higher).

We are interested in recording examples of this, so we can fix them.  If you would be willing to share the model with me, even privately, I'd like to make sure we add it to the test suite for any fixes.  If you are not comfortable sharing it here, you can email it to me at jeff.strater@autodesk.com, or if it is too big to attach to an email, you can put it on some file-sharing service like Dropbox, etc.  Thanks!