Triangles showing outside shape boundaries at anchor points. What the heck?

New Here ,
May 17, 2021 May 17, 2021

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I'm having the strangest issue with the new CC Iluustrator. I'm noticing that when I zoom in super close to ajust the handles on corner anchor points, there are oftern weird outlying shapes (triangular) that sit beside the shape. It's happening in several of my files and seems to be an issue when there are sharp, acute angles. Does anyone know what is going on and how to fix this? I hope my screen shots make sense. I selected the shape so you can see the blue outline and the weird "ghost triangle" next to it.

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Adobe Community Professional , May 17, 2021 May 17, 2021
Looks like a GPU Preview problem. Try switching with Cmd E or Ctrl E between GPU and CPU preview.

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Adobe Community Professional ,
May 17, 2021 May 17, 2021

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Looks like a GPU Preview problem.

Try switching with Cmd E or Ctrl E between GPU and CPU preview.

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New Here ,
May 17, 2021 May 17, 2021

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Hi there, yeah, that did the trick in this file. Is it possible to explain to me why CPU previews correctly vs GPU? I just want to understand it better. Thank you very much for your quick response.

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New Here ,
May 17, 2021 May 17, 2021

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I can see already that moving my way around the file is now quite sticky and jumpy. And scrubby zoom no longer functions. Are those the main differences with CPU preview?

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Adobe Community Professional ,
May 18, 2021 May 18, 2021

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https://helpx.adobe.com/illustrator/kb/gpu-performance-preview-improvements.html

GPU Preview is much faster, but sometimes less accurate.

But it is just a preview, it does not affect print or export (as far as I've seen).

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New Here ,
May 18, 2021 May 18, 2021

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Thank you for your help! Much appreciated!

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