I have a mesh with bent geometry, and I would like to make a proper rig and weight paint that straightens the model when the bones are straight.

I would like to know if there is a technique in Blender for bones to weight paint like cylinders with the weight at the center of the bone. Also, as far as I know, there is no edge loop face select in Blender's weight paint mode to easily assign weights to face edge loops, is there?

Desired weight paint

(Broken) Automatic weight paint for curved mesh

Blender automatic weight paint by default only seems to work correctly for straight geometry.

Is there a technique to weight paint where the bones are weighted like rotated cylinders? Or some clever weight paint technique in an edge loop fashion?

Here is an example blend, broken bending with automatic weights for a simple bent mesh:


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