What is the role of Auto-smooth?
I have noticed this: the "Auto-smooth" I can't figure out what is its' meaning. I understand that i can use it combing with the smooth shading. For example: A) FLAT B) SMOOTH C) SMOOTH & AUTOSMOOTH 30° D) SMOOTH & EDGE SPLIT 30° It seems that Auto-smooth works like the Edge Split Modifier, with the huge difference that doesn't add vertex and edge loop. My mesh from B) to C) has the same amount of vertex while mesh from B) to D) doubles the number. My question is: Why there is this Autosmooth? Could be useful for create hard edges in my low poly (it doesn't increase the number of my vertex) and let me have nice and clean surface for a possible bake with my high poly? Thank you to anyone will help me!
With Blender 2.80 the use of the Edge Split modifier is deprecated in favor of new custom normals.
Custom Normals allow precise tweaking of normals beyond what auto-smooth can do
There’s a lot more information in the Normals section of the recent documentation site. Although I’m not a big copy-n-paster, this is what it has to say about Auto-Smooth:
The Auto Smooth option is a quick and easy way to combine smooth and faceted faces in the same object.
In addition, when you use custom normals:
This has the side effect of enabling Auto Smooth, as that is necessary to use custom normals. Once you have custom normals, the angle threshold of the Auto Smooth behavior is disabled – all non-sharp-tagged edges will be considered as smooth, disregarding the angle between their faces.
Which brings us to the link to the documentation for Auto-Smooth:
It’s really just a simplistic version of the modifier, and is technically easier to use, but really doesn’t offer many benefits over the Edge Split modifier.
From the Manual:
With the Edge Split Modifier we get a result similar to Auto Smooth with the ability to choose which edges should be split, based on angle – those marked as sharp.
So, the modifier adds the ability to manually specify which edges get split by marking them “sharp.” But the modifier does not automatically set the mesh to “smooth” shaded.
Auto Smooth will work the same, regardless of what other modifiers you have in the stack, whereas the modifier will operate differently depending on what other modifiers are in the stack, and where it is placed among them.
As far as baking is concerned, you’ll have to try it and see. It’s unclear what that problem is, and it’d be a separate question anyway.
I think maybe U already solved this,
I was in a same situation today, And I solved it by my self.
The way is Just scroll down to [Geometry data] tab then try to clear these datas.
It was works on my Blender v2.79 mac.
sry 4 my bad English.
I hope this will be UR help.
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