I'm creating a simple jar and lid in Cycles, but the sides of lid have this odd gradient effect I can't seem to get rid of. The highlights are only visible along the upper half of the sides. I'm not sure if I'm explaining it well, so here are a couple of images.

This is the effect I want: Plastic jar lid

And this is what I currently have: Plastic jar render

Here's the node setup, in case it helps. I'm want a glossy plastic effect: Nodes

I don't know if this is a problem with the material, the lighting setup, both, or something else entirely.

Edit: I don't think my question is necessarily a duplicate of Glossy reflections and smooth shading. That question has more to do with creating reflections on an object with both flat and beveled surfaces. I'm trying to get the appropriate lighting on the side of a cylinder.

  • 1
    $\begingroup$ Does the issue persist when you use a the built in Principled node instead of your custom PBR set-up? and what about without the bump map? $\endgroup$
    – Chris D
    Jan 14, 2019 at 2:50
  • $\begingroup$ Possible duplicate of Glossy reflections and smooth shading $\endgroup$ Jan 14, 2019 at 3:38
  • $\begingroup$ I probably should have mentioned that I'm new to Blender. I wasn't aware of the Principled node existed until now, but the lighting issue is still the same after messing with it. Removing the bump map didn't help, either. $\endgroup$ Jan 14, 2019 at 5:45

1 Answer 1


Out of curiosity, I added 2 edge loops to the cylinder, and that seemed to fix the problem I was having with the lighting. I've only been using Blender for a few weeks, so I can't explain why that fixed it, but it did.

The wireframe with the additional edge loops highlighted: enter image description here

And now the lighting affects the entire edge. enter image description here


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