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Performance drop at Sunset/Sunrise-DayNight cycle(UE4 4.20.1)


my problem is I have a Day-Night System, at Sunset/Sunrise the Performance drops (up to 5ms)!

Is this Normal? The Directional Light (Sun) works fine at Day/Night but at Sunset/Sunrise the FPS drops. The Sun is Casting long Shadown at Sunset/Sunrise, could this be the reason for it?



Product Version: UE 4.20
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asked Aug 20 '18 at 02:40 AM in Rendering

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Eric Navarra
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The case, where your light is parallel to the ground is expected to cost significantly more in regards to shadowcasting. Adjust the cycle in a such way, to completely disable the sun, when it approaches horizon.

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answered Aug 20 '18 at 11:46 AM

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