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Decal axis constrain?

Hello there! So, i'm trying to use a decal to mimic a light projecting an image, but the image gets projected on both top and bottom of the model. Is there a way to set the decal shader to only affect (project onto) +Z and not -Z?

I tried using the following with no luck (maybe due to the nature of decals?.. https://forums.unrealengine.com/showthread.php?16944-Z-Axis-Oriented-Material-Issues

Please help =)

Product Version: UE 4.13
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asked Sep 13 '16 at 10:13 AM in Blueprint Scripting

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ronaldk
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avatar image Sneppy Oct 15 '16 at 02:37 PM

I'm also facing a similar problem, where I want my decal to be projected on horizontal surfaces only, and not on walls as well. I think that solution doesn't work because it can't really convert from tangent to world space in a decal material. Have you managed to get it to work?

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