Smooth Terrain 2.0.0

Changes since 1.0.3 for Minecraft 26.3 / Fabric.

Rounded movement and collisions

• Improved experimental uphill traversal, step selection and downhill contact while retaining Minecraft's normal jumping, gravity, falling and legal step height.
• Fixed jump-building beneath the player being blocked at high rounding. Placement checks now consider the prospective rounded collision geometry while preserving normal placement restrictions and obstruction by other entities.
• Fixed phantom collision columns above narrow pillars when collision rays only touched a shared mesh ridge.
• Fixed collision coverage at steep surfaces, re-entrant corners, narrow passages and thin mixed-material walls.
• Fixed stale neighbouring collision shapes after material-only block changes and chunk refreshes.
• Safe Movement remains enabled by default. Experimental rounded movement is opt-in; player hitboxes and legal step height have not been increased.

Terrain and rendering

• Improved rounding around caves, ridges and narrow openings with directional clearance protection.
• Fixed exposed dirt triangles on upward-facing snow-covered slopes and snow discontinuities at vertical chunk-section boundaries.
• Improved material-boundary consistency while retaining Minecraft's pixel textures and biome colours.
• Retained configurable leaf/log rounding, Better Grass-style sides, vegetation offsets, blacklists and connected water/ice shorelines.

Reliability and performance

• Hardened mesh-resource ownership and exception cleanup, configuration snapshots and cache invalidation.
• Retained bounded collision caches and earlier terrain-baking/allocation optimizations.
• Added a bounded placement-preview cache so repeated attempts do not continuously rebuild unchanged geometry.
• Expanded geometry, movement, placement-safety and deterministic fuzz regression checks. Local performance measurements cover specific workloads; this is not a promise of higher FPS, particularly with shaders.

Compatibility and limits

• Fabric 26.3, Java 25+, Fabric Loader 0.19.5+. Optional Sodium, Iris and Mod Menu integrations remain supported; install those mods separately.
• Vanilla and Sodium/Iris/Mellow scenarios were checked during development. The author has also playtested additional shader, Sodium and mod combinations; universal compatibility is not guaranteed.
• Final jump-building checks passed at 0/25/50/80/100% rounding and in Safe Movement. Experimental movement remains a setting to choose deliberately.
• Dedicated and remote multiplayer were not tested in the final audit. Existing remote-server opt-in restrictions remain in place.
• Some steep obstacles require a normal jump. Short automated runs do not establish long-term memory-leak freedom or replace human playtesting.