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Objects from sketch up has overlapping UVs and Lightmap UV are overlapping

I would like to try Architecture viz with UE4 & Sketch up pro.

The case I import the data from sketch up to UE 4.21, I always have same trouble... When building, the UVs of every object overlapped. So, the object does not fall shadow. (The shadow from directional light falls, but when I touch the roof, the shadow disappears. inside sky light does not worked.)

I'm always exporting using datasmith, but still the lightmap's UVs overlapped. Is not datasmith optimized?

I can't improve :(

UE4とスケッチアップproを用いて、建築vizを行いたいのですが、 いつも同じ問題が発生します。 ビルドすると、あらゆるオブジェクトのUVsがオーバーラップし、 ライトマップが生成されないエラーが出てしまうのです。

(屋根を外すと、ダイレクショナルライトの光で影ができるようになるのですが、 屋根を戻すと、室内のスカイライトが機能せずに、影ができません。)

スケッチアップからデータを持ってくるときは、常にdatasmithを使っているのですが、 その過程でUVマップはUE4のライトマップが生成されるように最適化されないのでしょうか? どなたかご教授頂けると幸いです。

Product Version: UE 4.21
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asked Feb 15 '19 at 11:15 AM in Rendering

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