Procedural Mesh Generation
You can generate the visual mesh by using FDynamicMeshBuilder. You can create arbitrary geometry with that class, if you search the source code from GitHub, you should see a lot of examples of it being used.
If you wanted to do voxelized terrain like minecraft. You would need to handle collision by likely using raycasts against the voxel octree you create.
Hope that helps!
Cheers, Nick (Epic Games)
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