There are basically two ways of doing procedural content creation, the first one is to create all from scratch even the geometry and the second is to use pre-made content and spawn it in the map applying procedural algorithms.
Some info about both techinques:
- Wiki post about procedural mesh generation: A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums
- Official training video about procedural content generation using static mesh instances: Twitch
The first technique will also require to spawn your procedural content on the map though.
EDIT: I’ll resolve the issue for now. If you need any further assistance just open it again and I’ll be glad to help you out.