@Ryan, I made the model for the tornado asymmetrical so that when it rotates there will be a change in silhouette. I didn't thought it will go wobbly. I'm not using vertex offset, just panning noise texture and rotating it over lifetime. I will try to add the pulsing and see how it will look. The mesh at the bottom is seperated, I tried to blend it as close as I could. I will increase the overall motion and see how it will turn out. Thanks for your feedback.