BUG - quality of the sun (lens flare, bloom) dissapear in game simulate

I have a scene with a strange bug - when I press simulate - sun appear just a white cicle without effects, and after stop it’s still the same. But after project reboot - in editor all ok before press simulate - again and again.

I migrate this scene into blank project and create new level - EMPTY . I copy sun, skylight from this level to old scene (which I migrate), and on the old scene I delete anything.

please, see it:
https://drive.google.com/open?id=0B8AB9z2m-RC1VldCLTI4NE1fLVE

On the EMPTY level all is ok - in Editor, in Simulate mode - sun is good.
But if change map to ApartmentCUT (migrate map) and press simulate - sun ugly again.
and if change level after it to EMPTY - sun ugly there too.

If restart project - all ok before press simulate on migrate level.

IF it’s not a BUG, I very very appreciate explanation how this magic work.

Hi 6r0m,

In your level Blueprint you have a function called Scalability Settings. In this function you are setting your bloom quality to 0. This is removing your lens flare and bloom. Here is a screenshot of the node that is causing the issue. Either remove that from the function or set your bloom quality to a value above 0.

110747-node.jpg

Hope that helps,

Ed