... -HDR effect is not noticable compared to what I was seeing with MGE. ...
i also noticed a difference with hdr and bloom shaders - may it be that the sky box is not affected by any shader?
i cant say that for sure, but i believe i newer saw changing brightness in the sky nor ive seen (even a little) bloom on the clouds.
the pro is that the sky alway looks natural whith no oversaturated colors or an only white horizon, but i think the shaders should include the skybox maybe with 50% opacity.
i might be completely wrong with that though