Hello everyone,
I’m relatively new to Blender and have encountered a recurring issue. When I use the Subdivision Surface modifier, gray line geometry appears in Edit Mode on certain parts with quad faces.
If you have any suggestions or solutions for this problem, I would greatly appreciate your help.
Thank you in advance for your assistance!
Hi and welcome, can you post a wireframe image of your model?
Welcome 
…
…this looks like some rotate or spinned object to mme like so:
You might spent some minutes on this forum to be able to upload a blend file… ??
Thank you so much for the warm welcome, your time, and your response. I had the ‘outline’ option enabled, but once I disabled it, everything returned to normal. I had been following a few tutorials, and this issue kept occurring. Thanks once again for your help!
