Just wondering if anyone else has stumbled across this?
Fairly basic scene - model in centre - lit with HDRI. All good. During the life of the file, red background was experimented with, but now back to white. HDRI used has also changed a few times. Two cameras set up. Switch to Camera 1 for rendering - all fine - white background, correct HDRI - switch to camera 2 in the camera tree - bang - old red background and incorrect HDRI appears. Once this happens - can't get back to the correct environment for any camera without closing the file and re-opening.
Weird!
Could it be that you ended up saving a viewset rather than just a camera?
Didn't even know I could do that :-)
...and yes, I had done that ... just noticed the different icon in the Camera tree.
Thank you