Halcyon Shaders 1 20 1 1 19 4 An Atmospheric Shaderpack
Halcyon Shaders (1.21, 1.20.1) is a realistic / atmospheric shader, employing heavy use of features such as volumetric clouds, fog, and PCSS. A more artsy / nostalgic shader that goes back to the roots of Minecraft shaderpacks.

Features:
- Custom lighting.
 - Dynamic shadowing from the sun/moon.
 - Percentage-closer soft shadowing & a percentage-closer filter.
 - Physically-based diffuse shading.
 - A physically-based atmospheric scattering model for the sky & sun/moon.
 - Screen-space reflections.
 - Physically-based specular highlight (GGX).
 - Refraction.
 - Dual-deferred rendering of solid & transparent blocks.
 - Shadow-space / projected caustics.
 - Volumetric fog & lighting.
 - Height fog.
 - Water fog.
 - Cycle fog (day-to-day fog variation).
 - Morning fog.
 - Volumetric mist.
 - Coloured volumetric lighting & volumetric caustics.
 - Bloom.
 - Depth of field.
 - Volumetric clouds.
 
Screenshots:




















Requires:
Iris Shaders Mod (Optional)
How to install:
- Please visit the following link for full instructions: How To Download & Install Shaders with OptiFine