[feynman]

When you load a new HDR image into the Background slot, the other slots do not update - even if "Same as Background" is selected. To be sure, one always has to load manually into the other slots. That is not very intuitive.

[tom]

It's the expected behavior because, when you have "Same as Background" selected in other slots, they will be rendered using the option defined in Background slot disregarding the path/file loaded in other slots. This way it's more flexible and you can switch to another option in any slot when needed. For instance, it could be the previously loaded map...