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VRAM Killer

VRAM Killer

A VRAM optimization mod for Minecraft.

462
5
462
5

Compatibility

Minecraft: Java Edition

26.1.x

Platforms

Supported environments

Client-side

Links

Report issues View source

Tags

Creators

Details

Licensed CC0-1.0
Published last month

VRAM Killer

Minecraft Fabric mod for runtime VRAM optimization via RGB5_A1 texture format conversion.

License

CC0 1.0 Universal (Public Domain)

Dedicated to the public domain. Free to use, modify, distribute without restrictions.

Features

RGBA5551 Texture Conversion (Core Feature)

  • Converts textures with binary alpha (all pixels α=0 or α=255) to 16-bit RGB5_A1 format
  • 50% VRAM savings per converted texture (32bpp → 16bpp)
  • Uses standard OpenGL GL_RGB5_A1 format — fully compatible with MC 1.21+ GpuDevice
  • Automatic binary-alpha detection — skips textures with semi-transparent pixels
  • Inline conversion during texture upload — no async pipeline needed

Supported Texture Types:

  • Block textures (atlas-based)
  • Item textures
  • Entity/Mob sprites (via SpriteContents.uploadFirstFrame() hook)
  • GUI elements with opaque/transparency-only regions
  • Environment textures (sky, end sky, etc.)
  • Particle textures

Excluded (correctly skipped):

  • Textures with gradient/semi-transparent alpha (e.g., glass, stained glass)
  • Font glyphs
  • UI icons with anti-aliased edges

Texture Caching System

  • Pre-upload pixel caching via TextureContentsMixin
  • Multi-point sampling validation (512 sample points, <2% non-zero threshold)
  • Smart zero-pixel detection for top-transparent UI icons (edition.png, minecraft.png)
  • Sprite pixel capture at correct timing (uploadFirstFrame for async-loaded entities)

Texture Scheduling

  • Hot/Warm/Cold zone classification for textures
  • Path-based zone assignment (blocks/items → Hot, entities → Warm)
  • Dynamic eviction thresholds based on VRAM pressure
  • Grace period for newly loaded textures (30s default)

VRAM Monitoring

  • NVIDIA GPU support via nvidia-smi (Windows API)
  • AMD GPU support via GL_ATI_meminfo
  • Background monitoring with failure backoff

Leak Detection

  • Tracks texture creation and destruction
  • Identifies orphaned textures
  • Configurable detection thresholds (default: 300s interval)

Debug Overlay

  • F3+V to toggle VRAM stats panel in F3 debug screen
  • Shows:
    • Converted/Skipped texture counts
    • Total VRAM saved (MB)
    • Conversion statistics

Compatibility

  • ✅ Sodium 0.8.9+ (automatic detection)
  • ✅ Iris shaders (shadow resolution optimization)
  • ✅ MC 1.21+ GpuDevice (Vulkan-like rendering pipeline)

Public domain (CC0). No restrictions.