Houdini Tutorial - Burn the paper FX with Vellum and Pyro

As usual these are a few references inspired me or I just copied some of the approaches, techniques.

Much much more complicated and detailed approach
https://youtu.be/zVHTxWEXjfc?si=d45s1Jgk6iuYhHbQ

General Vellum tips and tricks you need, especially confetti set up for paper feel.
https://tokeru.com/cgwiki/HoudiniVellum.html#vellum_confetti

Complete workflow to burn a flag
https://www.youtube.com/watch?v=UkM9TbghJlw

More fun Vellum solver videos
https://www.youtube.com/watch?v=h2r5WjFQg-4
https://www.youtube.com/watch?v=xrJzqh_dSRY
https://www.youtube.com/watch?v=2Q5jJNvLCRg
https://www.youtube.com/watch?v=I5yo9LiItZc
Here we go with burning things out.
Start with..
/In Houdini create a grid, remesh to triangles - Vellum better works with triangulated mesh and nicer to fracture pieces.

/Next in Vellum solver animate bend constraint group - rest length from 0 to 3 for example. Here I did a blend for restlength with a mask. This will fold up pieces of paper.

/With mask goes in a wave through the surface - release weld constraints which hold the paper together all that time. I did it inside a solver with adding points to group_broken=1. Don't forget to activate breaking checkbox on weld constraints.

/Inside vellum solver create different forces and velocities for released pieces.

/Isolate the portion where our wave mask = 1, and make it density, temperature source for the smoke and fire simulation.

/Calculate interesting velocity on pieces for future smoke and fire be advected in a curly motion. Something like
vector c = cross(@N,{0,1,0});
v@vel = cross(v@N,c) ;

/Create a fire and burn it out. That is pretty straight forward with Pyro solver or with emotions which accumulated inside.

/Do all that additional particles and sparks . you know. Materials. Lights. Render. Compositing all the AOVs with ACES color management. Don't forget to add a nice piece of color correction and motion blur, and denoising, and glow, and camera lens distortions, and press play.

Voila. Recipe. Formula. Ready.
00:00 - Introduction
00:37 - Vellum setup and simulation
38:53 - Pyro Sim
56:23 - Particles Sim Overview
59:29 - Outro

Видео Houdini Tutorial - Burn the paper FX with Vellum and Pyro канала Purple Light