Hi all, i am basically creating a tunnel of smoke in blender 2.77, cycles.
i have a flat ring mesh with a vortex underneath, and i have also added a cylinder on the outside (collision object) with a cone on the inside (also collision object) so that i can see thru this tunnel. i run the simulation, bake it and when i render it you can see this odd pattern in the smoke, both inside and outside, probably because the collision object causes something in the simulation. i have tried increasing resolution in the smoke, both in the base resolution and "show high resolution" panels, currently 128 divisions, and have gone up to 5 divisions in high res panel. I have also increased heterogeneous volume sampling step size which does help but i lose a lot of detail. currently step size is 0.6. this "pattern" is quite persistent thru the animation and looks pretty awful.
anyone had this before?