You can also use the shatter filter with a separate CC Particle World layer. Set the CC Particle world’s “Floor” field to ice and adjust to your liking. Just precompose the area you want to shatter, apply the shatter effects (glass texture) and keyframe the CC Particle World to increase the opacity and birth rate. after a second or so, keyframe the birth rate back to zero. Apply the colour of whatever you shattering for best effect.