If you mean some glitter or twinkle, then AE is the better solution. Most likely you simply didn’t experiment with blendmodes enough and didn’t figure in additional plugins such as Knoll Light Factory, Starglow or others in your equation. If you just mean some brightness variations, then put your shaders in the specular color and diffuse channels. The keypoint here is to have strong variations in the specular values to get the illusion of varying light reflectivity. You need the diffuse channel mainly to compensate for overbright areas.
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