Why not simply work with multiple duplicates and Layer emitters in particular? Have two duplicates of your text, make one a matte for the other. Your text should completely disapper. Now animate the position of the text and the edges will appear. The longer the duration, the more “sand” will accumulate. Use blurs and tools like Obvious FX erodilation to get rid of too sharp corners, use additional duplicates to avoid opacity becoming too low. With your animted reveal in a precomp, use it as a layer grid emitter for Particular in your main comp. Make the particles static (Velocity 0) and blow them with Wind.
Mylenium
[Pour Myl