I am working on an animation of a product in blender using the Cycles renderer. The preview looks good, but the render shows uneven shading in an area. The only reason I can figure for that area looking different is there are a lot of very small polygons together. That being said, I don't know why the preview wouldn't show an issue.
What setting(s) could cause this kind of behavior?
For future reference, I selected the problematic polygons using the Select Flat Face tool and then used the Remove Doubles tool. I tweaked the tolerance to keep sufficient detail and remove unneeded complexity.
Thank you to LukeD!
I'm sorry I can't release the blend file because it includes design files that will not be made public.
I have checked and doublechecked that the "Viewport Visibility" and "Restrict Render" settings are the same for all the objects. I have reproduced the problem at multiple resolutions and number of samples.
Here are the render settings.
Thank you for your help.