Glitchy shapes appearing on rendered paths (Apple M1 Pro with macOS Monterey).

[Guest]

I am on a 2021 16-inch MacBook Pro with an Apple M1 Pro using macOS Monterey and using the latest version of Illustrator.

I have created a simple path with curved lines in Illustrator. The curved line renders ok, but there are these glitchy shapes appearing and if I change the shape of my curve, the shapes jump all over and rearrange. Then when I set the opacity to say 70% for my layer, these glitchy shapes remain at 100% opacity and you can clearly see them. Sometimes these shapes even protrude outside of my shape.

Any ideas on what's going on here and how to correct this?

[lambiloon]

Hi make sure your path or shape is closed, I mean the point from where you start must end on it to make complete shape

[Guest]

Thanks for the response. The path is closed. I have noticed that this issue only appears on the 'concave' portion of curves. For instance, if I overlap two ellipses on top of each other, and then use 'Minus Back' to create a crescent shape, only the concave curve will have these glitchy shapes that appear inside of my shape.

[Guest]

Oops, I didn't realize you can add pictures like this. This is when I simply overlapped two ellipses and performed a 'Minus Back' to create a crescent shape and then those odd shapes appear within my shape.

[Monika Gause · Accepted solution]

Try View > Preview on CPU

[Guest]

Aha, that's it, thank you!

Actually, it's called 'View on CPU' now. Maybe the menu label has changed recently from 'Preview on CPU' to 'View on CPU.'

Thank you so much.