See in this playground line 34-35, if you change the sphere for a plane, the SPS animation stop working as the plane is not exploded in several pieces like with the sphere: https://www.babylonjs-playground.com/#HDHQN#62
Can I change a parameter on the plane so that it works? I have not found anything in the documentation.
of course, it works https://www.babylonjs-playground.com/#HDHQN#63
The difference is that a plane mesh in BJS has only 2 facets, so you can’t get 4 facet particles …
If you want more pieces, maybe use a ground with several subdivisions or a ribbon then.