Geometry colleciton only support one physical material

[hermanskymap]

Hello,

I believe that when there are multiple Geometry Collections, there are no connections between the objects in different Geometry Collections. The system avoids floating chunks in a typical, single Geometry Collection setup by connecting objects in the collection to one another.

Because you have multiple collections you wish to connect, this thread might be informative:

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I would like to combine multiple GeometryCollection (GC) assets at runtime to simulate as one body. My understanding is that UClusterUnionComponent supports this. The GCs I’m using were built within the UE 5.4.4 editor and then saved. At runtime I then spawn a UClusterUnionComponent and call AddComponentToCluster and pass a pointer to a GC I spawned form the saved asset. For the other params, I pass an empty TArray for BoneIds (or just a zero in that array also seems to work) and bRebuildGeomet…

Where a user wants to use UClusterUnionComponent to combine Geometry Collections into one body.

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