Metallic Material Has Black In It

Question

If you look on the left rails there is some weird black shading? (im using blender cycles)

Try adding sharps to the ends of the rails (Edge mode, select, right click, sharp) and resetting the normals vectors — Nascent Space, Jul 20 '21 at 12:32
It can have multiple reasons. Please share the material node tree — Gorgious, Jul 20 '21 at 12:39
https://blender.stackexchange.com/questions/57662/how-to-get-rid-of-shadowy-texture-on-objects — Duarte Farrajota Ramos, Jul 20 '21 at 15:35

score 1 · Answer 1 · answered Jul 20 '21 at 14:34

This is a common issue with Shade Smooth. The normals on the sides are being interpolated to the face on the non-camera-facing side, and so the rendering engine is reporting it as a lost ray because it reflects into the background or otherwise runs out of light bounces before it can find a light.

You can see a recreation of the issue in this example scene.

Two simple ways to fix:

Enable Auto Smooth in Object Data Properties -> Normals.

Create some supporting loops on the ends to decrease the area over which the interpolation happens.

Metallic Material Has Black In It

1 Answers1