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Fog Splitscreen Problem 4.14.1 (Bug?)

If you add any kind of fog to your level and try to play splitscreen, the fog gets buggy.

When the players start to look around (first person view) the fog begins to flicker...

on the first picture everything is fine, while no player is looking around

on the second picture you can see how the fog gets buggy, if a player starts looking around...

i hope someone can help me with this or this bug gets fixed soon, because its kinda destroying my whole world :(

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Product Version: UE 4.14
capture.png (1.2 MB)
capture2.png (1.4 MB)
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asked Dec 31 '16 at 03:09 AM in Rendering

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avatar image OmniMachina Jan 04 '17 at 10:12 PM

push im still searching for a solution

avatar image Philty Dragonbreath Feb 22 '17 at 05:29 PM

I have the same problem in my project, in splitscreen. It seems that the fog is getting disabled when the source (The Sundisk) is not in the player's viewport anymore, and it pops back on when it is...

It reminds me of when you sometimes have particles that do not render if you do not have the particle system's origin (emitter) in the viewport.

No solution yet, but it's definitely only in splitscreen mode.

avatar image DocShaper Mar 30 '17 at 03:52 PM

There is definitly a problem/limitation when it comes to atmospheric fog and splitscreen mode. If you add a second local player in the multiplayer shootout project the sky turns black.

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2 answers: sort voted first

I had a similar issue, where in splitscreen mode, and only in some levels, the sky would randomly get completely culled and turn black for one player. I found out by accident that this bug only occurs when sg.PostProcessQuality is set to 2 or 3, so I looked into what specific values this was setting, and narrowed it down to r.LightShaftQuality.

Seems like an engine bug with r.LightShaftQuality interacting very poorly with AtmosphericFog when using splitscreen.

Setting r.LightShaftQuality to 0 completely fixed this problem for me.

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answered Apr 22 '17 at 08:07 PM

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Did the fix but seems to reset when i restart the engine

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answered May 01 '18 at 07:33 AM

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