The title is confusing.
I have a wireframe I made
This wireframe has "sharp" edges
This is what I mean by "flat" edges. How do I achieve this?
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1 Answer
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This could be a 1-segment Bevel, with original faces removed. This example makes the generation a little more procedural, using modifiers:
- Polyhedron
- Bevel: All: 1 segment, with material index set to 1
- A little GN modifier, deleting all faces with material index 0
- Solidify
- Another Bevel: By Angle: to hold shading, and Shade Smooth
Edit: (response to commentary)
Materials are assigned per-face; an object can have more than one material. The materials-per-object are held in a list. The Material Index is into that list.
The Bevel modifier doesn't offer to output a vertex-group 'generated vertices' or suchlike, but does offer to give a 'Material Index' to the generated faces. I've used that as a get-around. (Bottom of above illustration.)
A small Geometry Nodes modifier can delete faces, explicitly selecting by Material Index == 0:
The rest of the modifier stack is unexceptional: a Solidify, and further Bevel on the resulting 3D sharply angled edges, to prevent mushy interpolation of vertex-normals across those by smooth shading, while allowing the interpolation between faces meeting at shallower angles.
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$\begingroup$ Thanks for the reply! I am new to Blender, so I had to open your file to figure some stuff out. I still need some help though. My questions: 1. What is a material index? I think it's used for classifying different "layers". 2. I took a look at the node and while I can make some sense of it, I don't understand much of it. It would be great if you could explain it to me. Thanks. $\endgroup$ Jul 3 at 23:31
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1$\begingroup$ @SlightyBurntPorkChop .. hope the edit helps .. call back if not :) You should be able to apply the whole effect to new meshes by 1: Ctrl-L > Link Materials 2: Ctrl-L > Copy Modifiers 3: Object > Shade Smooth. $\endgroup$– Robin Betts ♦Jul 4 at 7:37
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$\begingroup$ Thanks for clearing some things up. I understand that I need to seperate the new beveled faces in order to delete them with a geometry node. One last question, I'm not entirely sure why beveling after the solidify is necessary. I don't understand your explanation. Thank you. $\endgroup$ Jul 4 at 16:51
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$\begingroup$ @SlightyBurntPorkChop imgur.com/a/goxvbLW takes a shot at explaining why you would want a second bevel to make smooth-shading look better. $\endgroup$– Robin Betts ♦Jul 4 at 18:53
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