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Angle Statue Disintegration

Brief User Manual:

The purpose of this project was to create disintegration effect using particle dynamics in Houdini. For this project I decided to create sand grain statue disintegrating by wind.  â€‹

  • ​​Render Program: Redshift                Average render time: 1min 8sec

  • Resolution: 1280 x 720                   Samples: High

  • Threshold: 0.005                               Lights: RS Dome Light (HDRI)

Technical Guide

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Source

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  • First of all, I used poly reduce to reduce the amount of poly of object. Then through vellum grain I made my object to particles which can make it as sand and through grain constraint node I reduced grain size to 0.005 as sand grains. Then I created sphere and add mountain node so that it can irregularly disintegrates the sand particles. Using transform node, I animated size of sphere that it can cover entire object so that sand disappears as the size of sphere grows. Then connected animated sphere and object with particles to group node that makes points to activate as the sphere covers object. Under the group node I added point wrangle node and write to when points are activated then the color is red, if it’s not color goes to original what I gave in color node.

DOP network

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  • Inside the DOP network, I connected source GEO out null to SOP path and CON out null to constraint SOP path. Then I added pop wind which allows control the direction of grain by wind, air resistance and noise of the wind. Also, I removed gravity so that sand does not fall into ground. Then I added point wrangle inside sop solver gave deactivate parameter to vellum points when the color is red.

Materials

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  • For grain material I had to input at the render tap in geo not making material node and connect to the RS material builder what we normally do when we give material to the object.

Description of problems encountered and solutions

  • Difficulties that I met while working on this project was just grain size. Since it was the sand grain size has to be smaller but as the grain size gets smaller particle amount gets higher to cover the object and file become very slow even though I used file cache it was so slow that I cannot even change the parameters. So, I found to use vellum source which makes more fast to load and also used file cache. Also to make more natural wind blow grain I raised substep to 8. 

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