The Vellum Solver in Houdini provides many features for interesting effects such as sticky collisions, tearing, deformable solids, and permanent bending from plastic flow.  This masterclass provides an overview of the inner workings of the Vellum Solver, then describes its use in such effects, covering topics such as graph coloring, animated constraint properties, dynamic constraints, plasticity, and soft bodies.


  • 0:04:25 PBD
  • 0:11:09 Integration Method
  • 0:21:18 Graph Colouring
  • 0:33:24 Solver Iterations
  • 0:44:26 Pins & Welds
  • 0:57:14 Hard Welds
  • 1:08:05 Hard Constraints - (Welding) Tearing
  • 1:33:04 Animating Constraints
  • 1:56:58 Dynamic Constraints
  • 2:24:52 Plasticity
  • 2:36:08 Soft Bodies & Grains


  • Kwesikwaa 7 months, 1 week ago  | 

    Great video. super intuitive! if this had come earlier, all other vellum videos would be needless.

  • chentxo 7 months, 1 week ago  | 

    Thanks a lot! It's worth every minute.

  • Nil Estany Costa 7 months ago  | 

    Amazing! More of this please!

  • dreamerflyer19 2 months, 1 week ago  | 

    Great video!Have a confuse with the ropeloop_autopin demo about the thickness, how can make the collider sucess when setting the thicknees bigger than the distance between points like wire solver? Thanks in advanced!

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