I was using the pre-built 1.2 libraries. I did get static collisions enabled for the cube actor - but for some reason the same rules didn’t work for the noise-field terrain.
I’m still struggling to understand how Unreal deals with collision meshes in general - but here’s the configuration that worked for me. It would be nice to have physics turned on and collisions enabled, but I’m guessing you’d have to build the collision mesh in RMC by hand.
MeshComponent->SetSimulatePhysics(false);
MeshComponent->SetCollisionEnabled(ECollisionEnabled::QueryAndPhysics);
MeshComponent->CreateMeshSection(0, Vertices, Triangles, BoundingBox, false, EUpdateFrequency::Infrequent);
MeshComponent->SetMaterial(0, Material);
MeshComponent->SetMeshSectionCollisionEnabled(0, true);