Astran Optimisation is a surgical-grade performance mod for NeoForge 1.21.1. While other mods simply lower settings, Astran rewrites the rendering pipeline to eliminate bottlenecks that cause frame stutters and low FPS.

Key Technical Features

Dynamic Particle Throttling

Unlike vanilla Minecraft which blindly renders thousands of particles, Astran implements an AI-driven throttling system. It monitors your real-time FPS and scales the particle budget dynamically:

Low FPS (<30): Aggressively caps particles to 50 to stabilize framerates.
High FPS (>60): Gradually allows up to 500 particles for visual fidelity.
Distance Culling: Automatically kills any particle generated outside your immediate vicinity.

Radical Entity Culling

Entities (mobs, players, and items) are the primary cause of CPU lag. Astran uses a multi-stage culling process:

Frustum Culling: If an entity is behind you or out of your FOV, it is completely ignored by the renderer.
Item-Level Culling: Items on the ground (from farms or mining) are culled at just 16 blocks, preventing "Item-Lag" from crashing your game.
PoseStack Optimization: Prevents the game from even calculating the 3D math for culled entities, saving massive CPU cycles.

Native In-Game Configuration

No more editing .json files and restarting. Access the Astran Menu directly through the "Mods" list to toggle features on the fly:

Aggressive Culling Toggle: Instant FPS boost for heavy modpacks.
NoRender Mode: High-speed rendering for low-end hardware.

Performance Comparison

Feature	Vanilla 1.21.1	Astran Optimisation
Particle Limit	~4,000 (Static)	50 - 500 (Dynamic)
Item Render Dist.	Up to 64 blocks	16 blocks (Optimized)
Off-Screen Entities	Rendered & Calculated	Fully Culled
FPS Stability	Variable/Stuttery	Consistent & Locked