I can't do it in the material editor, I can't do it with the Skylight light in the scene. If I go into ProRender in the Render tab Settings, and use Image Based Lighting the map I load can't be adjusted with and instance in the material editor. Nor can I find options with ProRender lights to rotate the hdri map.
Thank you for the reply. I had to roll back to 2.4.404 because that works with multi gpu for rendering. In that version rotating the RPREnv001 object doesn't affect the environment map, I made sure the Override 3dsmax Background is checked. If it's been fixed in 2.5 then never mind this reply. Have a good one.