Vellum

Bring softness, stretch and flow to your VFX with Houdini’s Vellum tools, the go-to solution for fast and versatile cloth, hair, soft body and tissue simulations. Whether you're animating flowing fabric, jiggling creatures, dynamic rope or fibers, Vellum delivers natural motion with exceptional performance.

UNIFIED SOLVER

Vellum is a complete unified multi-solver that lets you combine, rigid bodies, cloth, grains, wires and fluids in a single simulation. This creates a powerful sandbox for creating effects. The Vellum Solver supports VDB collisions created by the VDB Colliders SOP, similar to the MPM Solver. There is a Minimal mode on the Vellum Solver that supports VDB collisions with a limited feature set, but is faster and well suited for grain and fluid simulations.

Vellum Brush

The Vellum brush has already proved useful for pushing around hair and cloth. Now you can use it with fluids and grains to art direct the starting point for a simulation or model an organic shape. The brush works on the GPU to provide an interactive experience for artists.

Rigids and Plasticity

Shape matching makes it possible to include rigid elements in your Vellum simulations. Plasticity is also available to allow for denting. While the Bullet solver will still be needed for large scale effects, Vellum offers a good solution for small scale integrated simulations.

Fluids | Grains

Grains are significantly faster as a result of adding Fluids to the Vellum solver. Lessons learned during development on Fluids were used to speed up Grains.

VELLUM | Commercial

This faux commercial, created by Tim Van Helsdingen, shows all the Vellum tools working together in a single project. These integrated tools provide a powerful environment for creating dynamic effects for your projects.

Nodes

Here some of the nodes to look out for when working with Vellum in Houdini. These nodes let you initiate, add properties to and control the look of your simulations.

Vellum Solver

Vellum Brush

Vellum Constraints

Vellum Configure Grain

Vellum Attach Constraints

Vellum Drape

Vellum Reference Frame

Vellum Transform Pieces