I've been searching for effective switching ways between particle and rigid body simulation for some time. Then I found some cool references in Fujita-ri's site and tried to make a shot using from his idea.
I still struggle with V-Ray, but I'm gradually catching on each parameters.

Software: Houdini, Maya, V-Ray, AfterEffects
Reference: SOP to DOP by fujita-ri, Mars Defense Front (blog.livedoor.jp/fujitarium/)

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