Ambient occlusion node doesn't apply to beveled edges #90134

New Issue

Steffen Hartmann · 2021-07-25T18:27:16+02:00

Steffen Hartmann commented

2021-07-25 18:27:16 +02:00

System Information
Operating system: windows 10
Graphics card: rtx 3060

Blender Version
Broken: at least since 2.8
Worked: never?
Short description of error
Ambient occlusion node doesn't apply to beveled edges. As you can see on the picture below, the bevel is just white and the surrounding dark. I've tested mainly in cycles.

edit: I've tested a bit with the math node and i got a good result yet now i can't get rid of those thin lines around the bevel on the out edges

edit:
I've tried a test blend file Philipp Oeser provied in an arhcived thread and it clearly shows the problem. The beveled areas should be dark too but instead they are bright. This makes it close to impossible to use the ao node for a crease or edge mask (for edge wear or dirty creases).
Low poly (no beveled edges) models work ok but even a small bevel breaks the mask.

This can't be a wanted behavior. Or does it?

I know there is still the pointiness option in the geometry node but that usually doesn't work that great too. Like those faces on the bottom cylinder are bright and the side facing faces of the other cylinders are black. Weird.

Exact steps for others to reproduce the error
Use the bevel modifier (or create a bevel on an object/mesh via edit mode) and use the ambient occlusion node + color ramp to create a mask for inner edges. The AO node doesn't work on the bevel.

**System Information** Operating system: windows 10 Graphics card: rtx 3060 **Blender Version** Broken: at least since 2.8 Worked: never? **Short description of error** Ambient occlusion node doesn't apply to beveled edges. As you can see on the picture below, the bevel is just white and the surrounding dark. I've tested mainly in cycles. ![Screenshot 2021-05-14 205741.png](https://archive.blender.org/developer/F10103234/Screenshot_2021-05-14_205741.png) edit: I've tested a bit with the math node and i got a good result yet now i can't get rid of those thin lines around the bevel on the out edges ![Screenshot 2021-05-14 213449.png](https://archive.blender.org/developer/F10103390/Screenshot_2021-05-14_213449.png) edit: I've tried a test blend file Philipp Oeser provied in an arhcived thread and it clearly shows the problem. The beveled areas should be dark too but instead they are bright. This makes it close to impossible to use the ao node for a crease or edge mask (for edge wear or dirty creases). ![image.png](https://archive.blender.org/developer/F10236740/image.png) Low poly (no beveled edges) models work ok but even a small bevel breaks the mask. This can't be a wanted behavior. Or does it? I know there is still the pointiness option in the geometry node but that usually doesn't work that great too. ![image.png](https://archive.blender.org/developer/F10236757/image.png) Like those faces on the bottom cylinder are bright and the side facing faces of the other cylinders are black. Weird. **Exact steps for others to reproduce the error** Use the bevel modifier (or create a bevel on an object/mesh via edit mode) and use the ambient occlusion node + color ramp to create a mask for inner edges. The AO node doesn't work on the bevel.

Steffen Hartmann commented

2021-07-25 18:27:16 +02:00

Added subscriber: @Harti