is this cell size too big or not enough steps per frame?

[chris_img]

those jaggies are attached to an animated mesh and masked with a noise map.
Can't tell if i need to increase one or the other, or both?

[Svetlin.Nikolov]

Hey, looks like a third thing - when you emit fire/smoke from a mesh, the emission comes from voxels and they are not smooth near the mesh. You could modulate the smoke opacity at render time using a distance texture which is black near the mesh and white away from it in order to gradually fade them out near the geometry, or alternatively, you could cut them clean at render time using the geometry as an inverse render cutter - in this case it is best to also simulate using inscribed voxels under the Scene Interaction rollout.

One more thing to watch out for would be if the geometry is skinned and moving at the same time, it could overlap smoke and have it frozen inside it - in this case it's best to enable Clear Inside for the emitting geometry as well.

Hope this helps, cheers!