OptiFine HD Environment & Custom Colors

OptiFine gives resource pack creators control over the game's hardcoded colors and environmental effects.

• Custom Colors: Allows modification of colors for swamp foliage, water, sky, fog, particles, and even the XP bar.
• Custom Sky: Supports custom textures for the day and night sky, including multiple suns, moons, and rotating star fields.
• Custom Lighting: Allows for per-biome or per-dimension lightmaps, changing how light from torches or the sun illuminates the world.
• Natural Textures: Automatically rotates and flips block textures to remove the repetitive "grid" pattern seen on large surfaces like stone or dirt.