FastFastMap

A high-performance minimap mod for Minecraft 1.21.11 (Fabric). Built for speed — parallel chunk scanning, GPU tile caching, and seamless updates with zero flicker.

Features

HUD Minimap

Always-on minimap in the bottom-right corner of your screen.

Player direction arrow — red filled triangle with white outline, rotates with your view
Water bathymetry — see the terrain beneath the water, depth-shaded in blue
Smooth height shading — continuous brightness based on slope, not discrete steps
Biome tint — grass, leaves, and water colored per biome

Fullscreen Map `M`

Google Maps-style tile viewer. Open with M, close with M or Esc.

Zoom to cursor — scroll wheel zooms centered on your mouse position
Smooth zoom animation — no jarring snaps
LOD tile system — automatically switches tile resolution as you zoom in/out (zoom 5 = 16px/block → zoom −3 = 16 blocks/px)
Fallback rendering — lower-res tiles shown while high-res tiles load; no black squares
Right-click drag to pan, R to re-center on player

Persistent Cache

Your map data is saved to disk and restored on reconnect — no need to re-explore.

Separate cache per server address and world name
Auto-saves every 60 seconds and on disconnect
Previously explored areas appear on the map instantly when you rejoin

Performance

Chunk scanning runs on parallel worker threads (up to 4)
GPU tile cache with LRU eviction (128 tiles max)
Anti-flicker design — chunk updates never cause blank tiles; old tiles stay visible until the new render is ready, then swap seamlessly.
RAM tile cache capped at 512 tiles (~128 MB)