Source PFB file: https://pds-imaging.jpl.nasa.gov/data/mer/spirit/mer2mw_0xxx/data/navcam/site0137/2mesh_1907x_np_137_ffl_231_v2.pfb (site 137, drive 231).
PFB is Performer Fast Binary, an ancient format used by IRIS/SGI OpenGL Performer software.
Translated into point cloud using my PFB converter (under development):
https://github.com/jumpjack/VST-converter/blob/main/PFB-converter-kaitai%20-%20020.html
Now Investigating on textures and faces.