- Create a corona camera
- In the attributes manager, select the value 0 of the simple exposure and set it to -4.5
- Save it in the AM as a preset, for example "camera corona outdoors"
- If you try and load this preset, the value is reset to 0, not -4.5
Camera settings (in the section above) are not ignored, just tone mapping ones are.
I added a screenshot where I am saving the settings, just to be sure.