3

Just for completeness, for a square profile, you don't need a profile object; this 3D curve has been given a native bevel at minimum resolution, all vertices tilted to 45 degrees... And a curve can be given a Bevel Modifier to stand in the way of smooth shading interpolation over sharp corners: here, 2 segments with a profile shape of 1. And the bevel is ...


3

Because by default is spline set under Properties Editor > Data Properties > Active Spline as Smooth When Smooth unchecked, curve become shaded Flat, which means flat also in curvature. To make it smoother you can increase Resolution U (segment subdivisions) But in some cases it would be still segmented ... so Edge Split modifier seems to be better ...


3

Walk the edges. To give them some order walk the edges. It may take more than one spline to make the curve, since we cannot branch. For example the default cube when "de-faced" and converted to curve has 4 splines. Here is test script to walk the selected edges. It does not make the curve, rather creates an ordered list of the edges to use in ...


2

The Bevel Tool won't work, because of too tight topology. And without Clamp Overlap you'll get ugly artifacts. You need to keep enough space for the beveled edges, use n-gons if necessary.


1

You can enable viewing the curve's normals in edit mode using the overlay dropdown. If your curve is twisted, this will show up clearly in the angle of the normals: Unfortunately the only way I know to fix it is to select individual control points and either change their vector type to automatic (by typing VA) or by rotating the control point until the ...


1

Found that the mesh needs to be aligned ALONG the X and Y axis, as if it's lying on the ground for the fill to work. All the sources I saw didn't clarify that, only that it "needs to align with the X and Y axis", so I took it as having a value of zero for the alignment in general.


1

In Blender 2.8 you can go Edit > Preferences > Themes > 3D Viewport > Wire Edit and change the color there.


Only top voted, non community-wiki answers of a minimum length are eligible