Your map size and seed shape every wipe in Rust — how many monuments spawn, how spread out players are, and how hard your server has to work. This guide explains how server.worldsize and server.seed work, what size to pick for your player count, how to find good seeds, and how to change them. Use the size table to match the map to your population.
Map size by player count
| Worldsize | Players | Feel | Best for |
|---|---|---|---|
| 3000 | 50–100 | Tight, constant PvP | High-action combat servers |
| 3500 | ~100 | Balanced (Facepunch default) | The recommended starting point |
| 4000–4500 | 150–250 | Roomy but lively | Active mid-to-large servers |
| 4500+ | 300+ | Spread out; cars/helis shine | High-pop servers |
| 5000–6000 | High-pop / RP | Lots of empty space | Roleplay & PvE with big bases |
What map size is
Map size is set with server.worldsize and is roughly the width of the map in metres. It’s configurable from about 1000 to 6000, with most community servers running between 3500 and 4500. Bigger maps generate more monuments and more building space, but they also demand significantly more from your server’s CPU and RAM — and a sparse map feels dead, while a packed one feels chaotic.
Picking a size for your population
- Small (3000–3500) — high-action servers; players constantly run into each other, lots of PvP, fewer dead zones.
- Medium (3500–4500) — the sweet spot for most servers; enough monuments and space without big empty areas.
- Large (5000–6000) — big communities, roleplay and PvE; needs strong hardware to stay smooth and enough players to fill it.
The rule of thumb: match map size to how many people actually play. Too big for your pop feels empty; too small and it’s a meat grinder. PvP servers lean smaller; PvE and RP servers lean larger.
What a seed is
The server.seed is the number that generates the terrain and monument layout. The same seed plus the same size always produces the same map. Change the seed for a completely different layout; keep it to run the same map again next wipe. A “good seed” usually means balanced monument placement, plenty of decent building spots, good road connectivity and no major terrain bugs — communities share favourite seeds each wipe.
Finding and testing seeds
Because seed + size is deterministic, you can preview a map before committing: seed-sharing sites and community map previews (RustMaps, RustEdit) let you see exactly what a given seed/size combo generates. Pick one with the monuments and building areas you want, then lock it in. Many servers keep a popular seed for several wipes once players like it.
How to change map size and seed
Set both server.worldsize and server.seed in server.cfg (or your control panel) and they take effect on the next wipe — changing them forces a map wipe. See our guide on changing the map on your Rust server, and time it with the wipe schedule.
Frequently asked questions
What’s the best map size for a Rust server?
3500 is the Facepunch-recommended default and a great starting point for around 100 players. Go 3000 for tight PvP, 4000–4500 for 150–250 active players, and 5000+ only for high-pop or roleplay servers with the hardware to run them.
Does map size affect server performance?
Yes — larger maps use more RAM and CPU to generate and run. On underpowered hosting a big map can lag or crash, so size the map to both your player count and your hardware. A good host on modern CPUs handles large maps smoothly.
What does the seed do?
The seed determines the exact terrain and monument layout. Same seed + same worldsize = the identical map every time, so you can preview it in advance and reuse a favourite. Changing either the seed or the size forces a new map on the next wipe.
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