I'm trying to recreate a scene of the Jupiter 2 crash landing as it flies passed this pinnacle rock and there's all this smoke rising like from smudge pots. I'm having trouble finding the balance on the speed setting. when I have it turned up high enough to get the clouds looking right, it rises WAY too fast and when I turn it down it looks more like snow rising. Am I adjusting to wrong thing? I've played with the gravity control a bit thinking that might be it but have not seen an appreciable change. Suggestions anyone?