Block ESP v1.0.0 — Initial release

First public release of Block ESP for Minecraft 1.21.11 (Fabric).

Features

• Instant toggle with the X key — no chunk re-mesh, no freeze.
• Searchable grid of every block in the game (~1200 blocks) in the ModMenu config screen.
• Render distance slider — 1 to 16 chunks around the player.
• Pre-assigned colors for the default catalog blocks (ores, containers, spawners, utility, redstone, etc.).
• Connected outlines — adjacent enabled blocks share edges (clean look, fewer vertices).
• Background scanner — daemon thread pool, never blocks the render thread.
• Throttled incremental chunk scanning (max 8 chunks/tick, sorted by distance to the player).
• HUD toast — green "✓ ESP ON" or red "✗ ESP OFF" pill above the hotbar after each toggle.
• ModMenu config screen — search bar + slider + grid + ON/OFF + Reset / All / Done.
• Bilingual: English (en_us) and French (fr_fr).

Performance optimizations included in 1.0.0

• Primitive LongOpenHashSet (fastutil) for position lookups — zero Long autoboxing.
• Color channels pre-decoded at scan time inside the EspTarget record — no per-frame bit-shifting.
• Per-frame snapshot under a ReadWriteLock — render thread holds the lock for only ~1ms.
• Throttled chunk scanner — max 8 chunks/tick from a distance-sorted pending queue.
• Incremental diff on player move — only new chunks are queued.
• Math.sqrt removed from the line rasterizer — cube edges are axis-aligned.

Compatibility

• Minecraft 1.21.11 (only).
• Fabric Loader 0.17.0+.
• Fabric API (required).
• ModMenu 17.0.1 (optional, strongly recommended).
• Java 21+.
• Client-side only.