I want to build a game with a random seed generator that controls for randomized biomes and how said biomes appear in terms of size, fragmentation, location, etc. I have not the slightest clue how to begin the process of doing this though. Is there a blueprint or built-in tool that controls for something like this?
I already know how to build and design components of biomes myself, but I have never tried to actually make a seed map in Unreal before. Any tips or tutorials would be very helpful.
For terrain, no. For everything else you can use runtime PCG:
You will need custom logic for saving you generated world, it does not handle runtime saving by default.
for valheim style seeds the core is just one integer driving everything. keep a single random stream, set its seed once from your seed value, then always pull from that same stream in a fixed order for biome pick, size, placement and so on. same seed plus same call order gives the same map every time, which is why minecraft seeds work. for terrain in ue5 you can do this with landscape layers driven by that stream, and for everything placed on top runtime pcg takes the same seed and generates from it. store the seed int in your save and show it in the ui so players can reenter it. one detail that bites is calling random nodes outside the stream for decoration, that breaks determinism even with teh same seed. you can also try Runtime Clipboard Utility, a clipboard tool for Unreal Engine that lets players copy and paste seed strings to share maps: Runtime Clipboard Utility — Free Copy & Paste Text Nodes for Blueprints (UE5) | Fab