I just watched “The day after tomorrow” recently. I just found the way the ice was being formed looked fantastic!!

I wonder if that kind of effects can be archieved in Houdini? Does anyone know the trick behind those ice? I think it would be something with L_system. A few years ago, BUF made similar effects too (I saw it from one of its demo reels)

Does anyone have any suggestions of how to approach this “ice forming” effects in Houdini?

Thanks