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Troubles by Lighting build with transparent objects

Hi there, My Problem is, that I try to build my lighting with stationary lights in a "tunnel". To create the tunnel I had to vertex paint parts of stones and cliffs, that are around the tunnel, transparent. I set the opacity to masked.Material With movable light there are no problems, but if i bake the lighting (stationary lights) there are those artefacts as seen on the pictures below:movable lightbaked light only My question: How can I perevent those artefacts? Are there some transparent lighting bias that I have to increase? Thanks for youre answer!With Stone selectedFrom outside

Product Version: UE 4.19
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asked May 15 '18 at 02:02 PM in Rendering

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Mathisxy
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avatar image Mathisxy May 15 '18 at 04:50 PM

I tried a few more things and know I think the problem is clear:

The Transparent material still casts shadows, when it is baked. So i want that material to cast NO SHADOW where it is TRANSLUCENT. I think with a masked material that should be possible, because Alpha is wether 1 or 0: Maybe its causes problems, because i vertex painted the opacity...

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