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Fixed in Unity 5.4.1



Found in


Issue ID




Object lighting preview is empty for meshes with no normals

Global Illumination



Priority: 3Not yet prioritized for a release


Severity: 3Workaround is possible

To reproduce:
1. Open "Updated repro"
2. Open scene 1
3. Bake ligthmaps
4. Select Lighting > Object for "refinery no_normals" object
5. Notice preview is empty
6. Select Lighting > Object for "refinery" object
7. Notice that previews work fine even though refinery uses Import normals,but doesn't have them in mesh

ImportFBX Warnings:
Can't import tangents and binormals, because mesh 'Refinery' doesn't have it.

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