Thank you Mauro.

A lot of the .dds HDRI was over my head, so I'm doing some learning.

Link for Windows 10 .dds viewer:
https://ddsviewer.com/download.aspx

Link with two links to two ebalstudios tutorials on HDRI, rainbow zebra stripe, dds (Direct Draw Surface picture format) ... (They seem shy on details, to me...)
https://gumroad.com/l/jlvkd

- Brian

Seems that your zebra work is in Blender.
Maybe Keyshot could be used?
NVIDIA has a Texture plugin...

I downloaded some rainbow zebra .dds files, but looks like another has two "singular" points?