The "Joint Push/Pull" tool is indeed a plugin for SketchUp. This tool enables users to create complex, organic shapes easily by manipulating faces and edges in a more dynamic way than the standard push/pull tool. It can be particularly useful for quickly creating detailed models or for tasks that require a bit more flexibility than what the native tools offer.
Mastering Joint Push Pull in SketchUp: Solving Creases, Cracks, and Geometric Errors sketchup joint push pull crack
For curved surfaces, ensure the surface is properly selected. Then, choose a mode like "Joint Push Pull" or "Normal Push Pull" and drag to extrude it into a solid form. The "Joint Push/Pull" tool is indeed a plugin for SketchUp