Hello,
Im having a problem in my level. Brightness in my level kicks in after I start play/preview (happens with packaged game too). As you can see in video, it kicks in after 2 mins. Same thing happens after lighting build too. I have to wait some time for editor to render it correctly. Im saying brightness because I dont know what this issue is. It might not be about brightness at all. You can skip directly to 3:00 in video.
Thank you
Hi Monster,
I noticed in the video that before the issue appeared you changed the color of the walls. You may be triggering an event that is causing the change.
It honestly looks like the textures/materials are changing on the furniture in that room rather that the brightness increasing. If it was brightness issue you would see the change occur globally on the screen, but only some assets change their color values.
If this issue always occurs after a set amount of time in your level I would check your level blueprint as well to see if you have a timed event that is changing the materials or textures in that room.
Let me know if that helps,
Ed
I dont know if its related to color changing blueprint but I realized there are several things I missed to mention.
Yes this might not be related to brightness at all. That ‘kick in’ at the end happens to every object in level. I should have showed other areas as well.
This issue occours after lighting build in editor too. It takes some time to kick in like this in editor after lighting build. So it shouldnt be related to any blueprint, right? I can make a video or post some pictures for it if you want.
There is only console command for fullscreen in level blueprint.
Edit: This happens even if I dont change color of the wall
I will be uploading this project. I will problaly take 6 hours 
bad connection. In the mean time you can take look at this video. It kicks in after 5 mins. Time might be dependent on how much my compurter has ram or cpu empty at that moment.
Hey, after taking a look at your sample project I noticed that your Packed Light and Shadow Map Texture Size was set to a value of 4096 in your lightmass settings. This is adding to the time it takes to apply the lightmap to the scene. The “brightness” you see appearing is the lightmap being applied to the static meshes. Normally this is instantaneous but due to the sheer amount of lightmap data being applied it is taking some time. Try resetting that value to the default 1024.
I can also confirm that this isn’t a bug with the engine. Also there are several meshes with lightmap density that is way too high, mainly the light fixtures. Lower the lightmap resolution on the small objects that are appearing red in screenshot.
mate.
Will try those as soon as possible.
