Welcome to a new Houdini Course: Ash Disintegration
This effect is achieved through a method which is essentially layering two different simulations that run at the same time.
Fracturing
We will start by fracturing the rose geometry, using a custom fracture method, which combines the common voronoi workflow with the boolean fracturing method.
Custom Solver
After we fracture the geometry, we are going to run the first simulation which will operate on our fractured pieces, and we are going to create a
custom solver that drives this simulation.
First Simulation
And then on top of this simulation we will run a second simulation that will make each individual fractured piece turn into even smaller pieces that disappear entirely over time.
So essentially, the geoemtry will first disintegrate into big pieces, and then these pieces will disintegrate into even smaller pieces, and we will be able to control
this transition between simulations seamlessly.
Rendering
After we set up all of the geometry and effects, we will render a few passes using Redshift. In this section I also go over how to export custom AOVs such as custom textures and houdini point attributes.
Nuke Compositing
Then we will bring everything inside of Nuke to create the final result.
Here I go over how to leverage the AOVs that we generated to have complete control over all aspects of the final look.

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