I was making an animation of the folding of a paper plane. The weight paint seemed like it was deforming the mesh uniformly, despite the fact that there was a gradient in the weight paint. To model this, I created a simpler version of the effect I want to achieve with a plane and a single bone. The weight paint does the same in this case as well: The plane with its weight paint before transformation.
I thought the bone was supposed to alter the shape of the plane more gradually. Wasn't it supposed to form more of a domelike mesh? Am I doing something wrong, or did I misunderstood the purpose of the weight paint?