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Issue with precomputed sky light on a landscape

I’m experiencing problems with precomputed light on a landscape:

alt text alt text

As you can see, there are visible seams right at the boundaries of the terrain segments (next screen is from the landscape mode with a terrain segment highlighted):

alt text

It happens only at this particular area, which is occluded by lots of static meshes (like a cave). It looks ok on the rest of the map and on the other maps as well (with identical settings):

alt text

I’ve also found out that this artifact is caused solely by sky light (turning it off fixes the issue). There are only a directional and a sky light on the map, both of them is stationary.

Here are the world lightmass settings:

alt text

Landscape light and lightmass settings:

alt text

Sky light settings:

alt text

I’ve tried tuning different settings, clearing all the cached lightmaps and rebuilding light with max quality, but this bug just won’t go away :( Would really appreciate any thoughts on how to fix this.

Product Version: UE 4.10
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asked May 19 '16 at 11:54 AM in Rendering

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Static Lighting Resolution must be a round number (int) , not a float. Try that.

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answered May 23 '19 at 01:17 AM

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Blackhole Bilbao
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