Now I don't know a lot about SPH but from what i've seen in videos and read from wikipedia it's a sort of system that uses particles to simulate fluids or explosions and stuff like that right? What if (When you add SPH) you just changed the particles to a cube shape, and the physics would just play out by itself with the new cube shape? Obviously this would be a "Retro Mode" option.
If im entirely wrong, just know that I'm 13, and not an expert with this stuff, lol. If Im wrong, tell me