Incremental shaders

This is the first version of the shaders

Features

• Shadows with distortion to reduce aliasing
• Day/night cycle with proper darkening and blue-shifted night vision
• Distance fog that gets thicker at night
• Waving grass, flowers, and leaves (fades out at distance)
• ACES tone mapping with a cool blue tint
• Rain and thunderstorm effects (darker, desaturated, foggier)
• Torch flicker
• Vignette