This is an initial attempt to create a surface (that isn’t a cuboid) purely through procedural means. It was supposed to be a sphere, but the normals are still incorrect at the moment. (Actually, it was accidentally rendered inside-out, but I think I know why…)


Isosurfaces of the the density showing surfaces of the heavy (red) and light (blue) fluids, as well as color slices of the density along the edges of the computational domain, at late time in the hydrodynamic RT instability (left) and strongly magnetized RT instability (right). In the MHD case, the magnetic field is initially parallel to the x-axis. The MHD flow shows much less fine scale structure than the hydro run, due to suppression of modes parallel to B. Nonetheless, the interface is still strongly unstable.”