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Strange Lightmap artifacts on simple geometry

Hey there,

I am relatively new to using UE 4, so I hope this issue has not been discussed before. I used search on the answerhub and in google, but could not find any solution to my problem.

Problem:

I have a simple szene-setup with a floor, a room and a roof. The lighting works pretty well on every asset except for the roof, althoug it has a veeeeeeeery simple geometry. It is little more detailied by now, because I thought it might be caused by not having enough polys or something, but that did not work either.

The result looks like on every quad-edge there seems to be an error (looks like a shadow). I used a customized lighting UV, just so that everything could be computed in the best way. You can see both screenshots attached. I don't know what I do wrong, because I did nothing different than when importing the floor and the room and these two assets do not behave like the roof. Any ideas?

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Product Version: UE 4.7
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01.jpg (115.4 kB)
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asked Jun 16 '15 at 06:53 AM in Rendering

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CASA_MT
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Hi!

Modular building has some issues. How to fix it you can read in this thread:

https://forums.unrealengine.com/showthread.php?46269-Modular-Asset-Lighting-Problem

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answered Jun 16 '15 at 07:06 AM

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svv3dUDN
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avatar image CASA_MT Jun 16 '15 at 09:05 AM

Thanks for the link, I got rid of this problem although I did not really do it the way it is described there. I refined my lighting UV and re-imported the mesh. After the re-import, UE4 auto-generated a UV-channel 2 with new orientations of the UV-islands. Instead of using my own created channel (which would be channel 1), I used the new auto-generated. The result is pretty good. With my own created channel, it still does not work though, not sure why -.-

But thanks anyway for the quick response ;)

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