Result from the magnetic Kelvin-Helmholtz instability in 3D, which shows rendered density slices (z = 0) at t = 1.6 (top) and t = 3.2 (bottom), for TSPH without diffusion (left), GDSPH without diffusion (middle left), GDSPH with diffusion (middle right) and GDSPH with an initial smoothed contact discontinuity (right). The TSPH result exhibits a very gloopy behaviour and shows decreased growth of the KH mode. This is mainly due to the artificial surface tension effect (see Fig. 10). GDSPH shows much better growth, the addition of diffusion only slightly improves the growth rate. The main effect from the magnetic field can be seen in all cases, which uncoils and stretches the vortex. The smoothed result closely resembles the MFM and grid result from Hopkins & Raives (2016).