Blender to UE4: UV Maps with Materials Assignments

Development Rendering
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1

Hello,

I am having quite a difficult time with the usual Blender to UE4 pipeline. I am importing a high detail static mesh which contains six materials and corresponding UV maps. In Blender I unwrap my mesh and I assign my material slots. In UE4 I import my mesh but surprise, my UV and materials are not turning up as usual/expected.

Blender material assignment:

233592-material.png
233592-material.png1786×571 72.5 KB

Blender UV mapping:

233593-uvmap.png
233593-uvmap.png1633×1023 86.4 KB

UE4 import:

233594-ue4.png
233594-ue4.png1830×785 421 KB

Notice how UV map #3 is absolutely not expected. Whether I import an additional lightmap makes no difference. Only the first UV and material are aligned. Please help me make sense of this codswallop. Any insight would be greatly appreciated. I have already redone the mesh, UVs, and meterials a number of times. :frowning:

Thank you very much in advance,

Fen

2

you only need one uv map when importing into ue4, you dont need one for every material. at the most basic level ue4 will only use the first uv map. as for the materials did you check off the import materials and import textures checkboxes. also the materials from blender will never import 100% correctly since the two programs use totally different nodes and programming languages. oh and more last thing to note is that when importing to ue4 it will automatically make all faces into tris. thats one reason why the world grid material looks odd.

3

But of course! Where did I get this weird idea I needed more UVs!