Here is my result of using this plugin:
https://.com/watch?v=WGHJr7gbOtQ
Been experimenting with exporting with this plugin doing tweaks to light settings mostly.
PostProcess ScreenSpace Reflection
I noticed that I got some strange artifacts and weird reflections that i do not see in the viewport. The difference in result is most likely to do with .hdr file, i’m not sure if you can change it.
But I figured out what was causing it.
Be very carefull with screen space reflections in the PostProcess. If a combination of Quality and Roughness is increased above standard it wil show a gritty effect in the viewport and create a bad result in the .hdr (comes over as it has many reflection artifacts.)
It’s better to use a reflection sphere/box instead.
Shift in colour
I noticed in one area a shift of colour it’s probably to do with colouring being different in one of the shots that’s stitched into 360.
If it’s possible you could try exporting it to png or jpg. HDR handles information a bit differently and can show a different result