Hi, to refine the result you can do several things, make the basic Voxels smaller , at the cost of render times, smooth the result using one of the filters, or do an offset that will also smooth the result using by dilate / erode ops . You can send us an email with your setup and we could have a look at it.

Hi admin, I solved it. The problem was a check center position in the volume object. So it re-centered the whole object at beginning dependent on the first particles.