I’m running into some visual artifacts when rendering high order elements with large deformation. The non-linear subdivisions are not updating for some surfaces, but seem to be for others, which leads to strange behavior along edges. See attached figure.
Also, I have uploaded the vtu file of a single 6th order lagrange hexahedra undergoing large deformation. The issue only appears for high order elements with large deformations. Setting the non-linear subdivisions to 1 gives non-overlapping results, but anything higher causes excessive z fighting caused by the non consistent edges.
Bad_cell_p6_0.vtu (21.4 KB)
Any ideas on how this can be resolved?
Thanks.