SpriteAnimation in unity3d?

You may want to check out ezsprite.com it's a nice spritesheet package for unity it works it's similar to the the animation system in flixel or cocos2d .. it can be used to create a particle effect manually .. I'm not 100% on if you could get it to work with the particle emitters in unity .. if you want to do that your best bet is to probably define a material with a shader that adjusts the uvs as time passes and use that with the emitter.

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