The nuclei spheres are created fairly roughly for the 3D viewport, but need to be smooth in the rendered image. To achieve this need to apply a subdivision surface modifier to each one that causes it to be rendered with many more points than in the viewport.
The nuclei spheres are created fairly roughly for the 3D viewport, but need to be smooth in the rendered image. To achieve this need to apply a subdivision surface modifier to each one that causes it to be rendered with many more points than in the viewport.