This video demonstrates the tornado in action:
My friend Rafal Kolanski and I decided to hack up a 10,000 particle simulation inside Teh Engine. (~10K is about what my computer can take, as reflected by the FPS counter. Now to move it to the GPU...)
Here are a few screen captures of the results (clicking on them will take you to the gallery for a full view and more images). The sequence follows the refinement of my simple 'tornado forces' approximation.
I think the most interesting/pretty images are toward the bottom of the gallery.
See the symmetry & tendrils caused by the bounds & simulation error!
Everything after the first 'light-speed-warp-factor-9-point-9' image is captured from a top-down view.