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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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avatar image Göbekli Apr 28 '19 at 04:54 PM

Hi! Have you succeeded to solve your shadows/lightmaps issues?

I have the same problem for an archviz building made in Sketchup Pro and import with datasmith in UE 4.21, but only for few static meshes (my building is built in many hierarchically components to keep instances).

Have you tried to ask on the Datasmith Forum? https://forums.unrealengine.com/unreal-engine/unreal-studio

I'll continue searching for answers to this problem on my own, and if you want, I'll tell you if I find anything. Bye :)

avatar image nomcotton May 05 '19 at 11:09 AM

Hi, Göbekli

Thank you for your reply :) I had not solved. But, I found reason of problem.

It seems like happen with importing data from "3D Warehouse". There was no problem with the data I created with Sketch up.

Maybe there is a problem if the model downloaded from "3D warehouse" is made with another CAD. (They already have UV light map? I don't know why exposed error.)

I will check it too. Please tell me if you understand something.

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