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Bad light properties on my material.

Hello!

This is my problem: I have created a Static Mesh throught a BSP (that I use like floor of my kitchen), after that I notice that something was wrong, and I have continued working, then when I do a Build lights, the mesh was rendered in black absolutely. I thought that this was because a bad normal mapping but seeing the mesh all looks great (at least I think so), searching in google I found some Ideas like do two sided materials and other that dont remember now.

Please help me in try to discover where is the problem, thanks and sorry for my english.
Thanks!

The following image is the Static Mesh after lighting builds::
vista2.png

And the next image is in static mesh editor in that you can see the normals and tangents of the mesh.
Normals.PNG

I found the error: the software does not noticed that my UV chanel 0 was over the limits, in other cases the software show a error saying that the static mesh have wrapping uv error but some times seems that this do not happend.

Same happen in any static mesh that comes from a simple box BSP trougth “convert to static mesh”.

Notice that I am using ue 4.10 version, on windows.