Strange and annoying artefacting in curved shapes with transparency

[Ben de Mont]

Hello Adobe community.

I am trying to draw one of the Emporer's Angels but when I create transparent curved shapes (black or white for shadow or highlight), there appears to be some extra lines that have been added.  How am I supposed to show my devotion to the God Emporer of Mankind with these horrific blemishes built into the artwork.

If I export to Photoshop, they are not there so I suspect this is just visual on my Mac.  Still annoying though and it's not the first time I've seen it.

Anyone else een or fixed this please?

[Ben de Mont · Accepted solution]

This was solved.  Command-E to switch view between GPU and CPU.  Pretty lame illustrator can't handle a few curved lines.  Maybe Figma does better with this.

[Brad @ Roaring Mouse]

"Pretty lame illustrator can't handle a few curved lines"

It's your GPU that's mis-rendering them. Illustrator is not sending anything different. This can be caused by many issues, including out of date video drivers, or more commonly an inappropriate driver (e.g. a card can have different drivers for different purposes. For instance, a NVIDIA Game Ready driver does not do as well with graphic programs as their Studio driver). CPUs generally have better rendering, but are, of course, slower. The option to use a GPU can result in faster screen draws, but at the expense of accuracy.