sol 90 RAC HDRI of, er, whatever you think you are seeing:

I have given up trying to direct your attention to the multiple, interlinking braided patterns on the surface.
Well, sol 91 is almost done ( 20:40 as I type ) and very few images downloaded today. My guess is the bandwidth was used to send down some interesting TEGA and MECA results -- perhaps including some meaningful AFM views.