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HQ Lightmap Moire pattern artifact in Alpha

I have noticed that all my HQ Lightmaps have this moire pattern in the Alpha. Is this expected in UE4.11? If not, how do I get rid of this artifact? All of my settings are epic and production quality. alt text

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Product Version: UE 4.11
alpha.jpg (135.5 kB)
alpha2.jpg (88.1 kB)
alpha3.jpg (72.5 kB)
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asked Apr 20 '16 at 03:45 PM in Rendering

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avatar image Haskellf Apr 25 '16 at 03:34 PM

I am assuming that this banding is intentional by UE4 but can anyone tell me what it is used for? From a rendering standpoint, I don't understand how this is created or useful?

avatar image Haskellf Apr 29 '16 at 04:58 PM

Anyone know what the banding portion of the Lightmap is used for in UE4? Is it filtered in the engine to provide additional light? Why is this information necessary?

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