neomonkeus/blender_nif_scripts — comment on commit 35c7328bb0d4fb72b612a776465902a0e6ee66f3
File: scripts/addons/io_scene_nif/import_nif.py line 2180
By neomonkeus:

Hmmm, indeed strange that is strange. Each Trishape should either be imported as a separate object, or merged into one. An b_obj can only have one b_mesh, which means that there should only be at most 1 vertex_col_layer. I suspect that this a symptom of something else going on, possibly an enforced flag for testing.