How can I create animated card graphics like in Hearthstone?

Posted by Appeltaart on Game Development See other posts from Game Development or by Appeltaart
Published on 2014-02-27T10:06:33Z Indexed on 2014/06/03 21:42 UTC
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In the game Hearthstone, there are cards with animated images on them. A few examples:

  1. http://www.hearthhead.com/card=281/argent-commander
  2. http://www.hearthhead.com/card=469/blood-imp

The animations seem to be composed of multiple effects:

  • Particle systems.
  • Fading sprites in and out/rotating them
  • Simple scrolling textures
  • A distortion effect, very evident in the cape and hair of example 1.
  • Swirling smoke effects, the light in example 1 and the green/purple glow in example 2.

The first three elements are trivial, what I'd like to know is how the last two could be done. Can this even be done realtime in a game, or are they pre-rendered animations?

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