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Details

RPG modpack for Minecraft 1.21.1 (Fabric), packwiz-managed, Modrinth-sourced.

- client_pack/ (177 mods): RPG classes & combat suite (Spell Engine, Simply Swords,
  puffish skills), epic-fantasy-realism worldgen (Tectonic tuned peaks/deep oceans,
  Terralith, Wilder Wild, CTOV towns, Serene Seasons), Xaero's Minimap/World Map +
  MapLink, Distant Horizons LODs, performance stack (ChunkSmith/C2ME/Krypton).
- server_pack/ (141 mods): dedicated server set incl. BlueMap 5.7 web map (:8100),
  docker-compose deployment.
- docs/, presets/ and tools/ for validation and profile conversion.

2026-08-24 18:36:35 -04:00

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FKRPG Perf Stack — Fabric 1.21.1 (ChunkSmith + C2ME + Network/Culling)

Voxy excluded from pack (private backport distributed separately). Pack is LOD-agnostic but ChunkSmith is Voxy-aware.

New mods (v0.1.0 → v0.2.0)

mod	version	side	why
chunksmith	3.4.1+1.21.1 (`4BeAEBIb/UcddkDsV`)	both	adaptive pregeneration throttle, CSLOD store, HTTP backchannel port+1, serves to Voxy/DH clients. Dedicated server always ON even without Voxy in pack.
c2me-fabric	0.4.0-alpha.0.27 (`VSNURh3q/gRm1ZAvc`)	both	concurrent chunk I/O/gen, big TPS for Tectonic 1.28 expansive terrain.
krypton	0.2.8 (`fQEb0iXm/Acz3ttTp`)	both	Netty flush consolidation, network tick.
alternate-current	mc1.21-1.9.0 (`r0v8vy1s/78P98rac`)	server	non-locational redstone, 10-20x dust lag fix.
moreculling	1.0.9 (`51shyZVL/p8iK6Q7D`)	client	culls hidden faces, +5-15% FPS with Sodium+EntityCulling.

Existing stack kept: lithium 0.15.4, modernfix 5.25.1, ferritecore 7.0.3, noisium 2.3.0, sodium 0.8.13 + sodium-extra + reeses, iris 1.8.14, entityculling 1.10.5, immediatelyfast 1.6.12.

Configs tuned

client_pack/config/chunksmith.json (copied to server_pack): lodEnabled auto, targetTickTimeMs 45, maxPregenerationRate 10, throttleAggressiveness 0.75, csloDCacheSizeMB 1024, syncIntervalSeconds 300, respectServerViewDistance true. With Voxy not in pack, auto = OFF on integrated server, ON on dedicated server (intended). Friends with private Voxy use /cslod inject.
client_pack/config/chunksmith-lod.properties: sync-interval-seconds=300, cache-size-mb=512
config/alternate-current.conf: enabled true, nonLocational true, updateOrderFix true
config/moreculling.toml: enabled true, cullLeaves true, mountainsCulling false (Tectonic peaks)
server_pack/config/c2me-notes.txt: C2ME has no file; if TPS dips during /chunksmith pregen, lower maxPregenerationRate to 6. C2ME + ChunkSmith throttle tested compatible with Noisium/FerriteCore/Lithium.
krypton zero-conf.

Voxy handling

voxy.pw.toml removed from both packs (side client previously). Custom backport voxy-0.2.10-custom.jar must be installed separately by friends (private, not hosted on Modrinth). Prism: Add to mods/ after importing FKRPG-*.mrpack, or host at private URL and packwiz url add.
ChunkSmith still builds CSLOD on dedicated server without Voxy present; clients with Voxy fetch via backchannel game port +1.

Coexistence notes

Do not add voxy-server-side / lod-server-support / voxyserver alongside ChunkSmith — declared incompatible. Pick ChunkSmith or those. We picked ChunkSmith.
moreculling complements entityculling + sodium — no conflict with continuity.
alternate-current order change safe (no Create in pack).
krypton safe with packetfixer/modernfix netty patches.

Testing

/chunksmith pregen 128, /cslod status, check logs/latest.log for Chunksmith: LOD ... and port bind on port+1.
Server TPS: spark profiler, watch c2me async threads + ChunkSmith throttle.

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