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Exporting a combinedmesh from Maya to UE4 problem

I have a glass window object in maya, which is a combination of 3 different objects (glass, frame and handle) each has its own materials. See picture: alt text And here is the hypergraph: alt text When I export it to unreal, I only see one material alt text

But for another object with two material, I see both materials there - using the same export and import settings.

Also when I build the lighting, I get this error:

Lightmap UV are overlapping by x%. please adjust content - Enable Error coloring to visualize.

I layout out each individual object UV similar to this UV layout: alt text

but after combining the objects the UV set looks like this: alt text

I assume that's why it's giving me that error?

Any help would be greatly appreciated. Thanks.

Product Version: UE 4.15
object.jpg (303.1 kB)
hypergraph.jpg (88.3 kB)
uv_1.jpg (99.5 kB)
uv_combined.jpg (107.2 kB)
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asked Mar 10 '17 at 10:45 AM in Using UE4

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