From the Smallville episode,
Kandor, in which we flash back its destruction on planet Krypton.
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The matte painting was built as a still in photoshop, and I used the warp tools in Nuke to animate it. I then comped it in After Effects with footage of an LA
firestorm to get the smoke to billow.
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The destruction of the city is a cocktail of particles, breaking glass elements, gas explosion elements, dust, and exploding Styrofoam.