This came out of a discussion on Scroll internal, we decided it might be worthwhile opening a thread here...
Postprocessing, and especially the bloom effect, does not always combine very well with background nebulae/planets, especially those that were not made with postpro in mind (i.e. basically all existing background assets). It can significantly change the perceived colour intensity, and it strongly washes out the brighter parts, as illustrated in this image from The Dagger:
As a practical illustration, this background was designed to look quite moody and atmospheric:
With
-post_process enabled, the bright edge of the planet is completely washed out, and the colours look intense and saturated, completely altering the atmosphere of the setting:
How feasible/desirable would it be to do something about this? Ideally (IMHO) bloom would not be applied to the background, or at least very much reduced, but I know very little about rendering code