Lighting / Smooth Shading Issue

I have a strange issue that I’ve not come across before using cycles.

I’m working on a model of JJ Abrams’s Enterprise, but along the rim of the dish I can’t seem to get rid of that lighting effect where it looks like I’m not using smooth shading, which I am.

I have attempted using an edge split with a set angle, I’ve also tried manually marking the sharp edges, no joy there either.

The only way I could get it to diminish was by increase the size of the sun, which, ruins all the shadows.

Any suggestions would be appreciated. Also any critiques would be welcome, though I know its not the right forum category for that.


It’s a termination issue due to not having enough polygons. Pathtracers cannot handle smoothed meshed with low poly counts. You can read more about it here http://www.geekshavefeelings.com/x/wp-content/uploads/2010/03/Its-Really-Not-a-Rendering-Bug-You-see…pdf

You’ll need to physically add more polygons to get rid of the effect, or just use a subsurf modifier.

Fantastic, thankyou. Now i’ve read about it, it makes perfect sense.