Firstly, I need to do camera tracking inside nuke so that I can determine the location of the building as well as go to the scene to match it. A big thank you to minhan for using mocha to make a “character roto” which helps with the masks used for tracking.

I imported into houdini by exporting the nuke camera, and these locators below are the axes that used to be in nuke, which makes it tremendously easier for me to locate them.

Firstly, I need to group the models I downloaded online so that I can subsequently paste the materials. And then crumble it.

I ran into a huge problem when dealing with crushing, which took me a week to fix. Many models downloaded from the internet have no thickness but only flakes, however houdini crushes the flakes inside, initially I tried converting to vdb mode but it takes a lot of time and tends to crash if you use this mode, and in the end it doesn’t even render. After going through a lot of tutorials on the internet, I decided that it would be better to process the faces in maya and give them thickness, which is a very tedious step, so if you have the chance it would be better to model it yourself.

I managed to break the staircase in its entirety, next I needed to create the smoke produced during the staircase breaking process.

I used the node “debrissource”, which helps me to identify the particles in the middle of the breakup, through which the smoke is generated.

Still running simulations, I’ve tested at least 4 versions

After importing into nuke, I checked and found a few frames that were missing and had extreme problems with the camera tracking, I needed to fix them.
1.Modify scatter
2.Adjust the camera tracking
3.Redo the smoke spread
4.Re-render