System Information
Operating system: win 10
Graphics card: gtx 1070
Blender Version
Broken: blender-2.80.0-git.91a155833e59-windows64
Short description of error
Bevel modifier gives unpredictable results when -segment- value is an odd number.
Exact steps for others to reproduce the error
open the attached file.
thanks
It seems to behave normally here.
Please provide more information about what behavior is unpredictable.
And provide a screenshot that shows what's wrong/what you would expect.
sorry, I wasn't clear.
Please take a look at the attached image, I hope this can help to understand what I mean.
Thanks.
This is "working as intended" in that the code doesn't try to be consistent here, and this isn't a regression. It is more like a feature request to come up with a consistency rule.
I'm sorry, but I don't have any good idea on how to fix this.
When there are an odd number of segments, it has to pick the material from one side or the other and it is a bit of a coin flip which side to pick. The logic used currently just depends on which edge happened to be picked to begin the list of edges around a vertex. Maybe in particular cases like yours one could propose heuristics like "pick the side with the lowest average z-value for coords" that might put some kind of consistency on, but I have no idea how many such inconsistent cases would be fixed by a rule like that, and how many would need a different rule.
I am closing this for now, but keeping this in mind as a feature request. There's a similar one for consistency of UV splitting, and I may work on both together some time in the future.
@Howard Trickey (howardt), would it be possible to just prioritize the materials based on the material slot index?
That's a nice idea, Jacques! I could easily implement that, and think I will. Thanks for the suggestion.