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The Bevel shader node can be used for rendering rounded corners.Like bump mapping, this does not modify the actual geometry, only the shading is affected.Slight rounding on edges helps to capture specular highlights that you would also see in the real world.
Note that this is a very expensive shader, and may slow down rendersby 20% even if there is a lot of other complexity in the scene.For that reason, we suggest to mainly use this for baking orstill frame renders where render time is not as much of an issue.TheBevel Modifier is a faster option when it works,but sometimes fails on complex or messy geometry.
Note
The Bevel node will not produce a valid result when:
orCaustic receiver while the scenecontains an activeCaustic caster,Caustic receiver, andShadow Caustic Light.
Open Shading Language is active while using the OptiX rendering backend.
Width of the bevel effect on edges.
Normal to apply bevel on top of, to be combined with aBump Nodefor example. When not connected, uses the surface normal.
Number of samples to take for each shader evaluation.More samples give more accurate results, but are also slower to render.The default value of 4 works well for most cases, with any noise resolved by using more AA samples.
Standard normal output.

A minimal node setup for working with the Bevel node.¶

Bevel shader bringing out specular highlights on the edges.¶