Fixed compile errors on newest Iris version

Changes

• Improved DH Terrain Noise

Fixes

• Fixed glitched out motion blur on mesa
• Fixed noise2/noise3 naming conflict

Fixes

• Fixed syntax error in skytextured

Fixes

• fixed water being invisible on 1.8.9
• fixed lack of lighting with no skylight and pbr enabled
• adjusted pbr brightness levels to align with non-pbr mode

Fixes

• Fixed PBR being too dark at Night

New Features

• Support for Distant Horizons
• Custom Lightmap
• Custom Stars and

Changes

• Removed requirement for manually setting resource pack resolution
• Switched to deferred lighting
• More realistic sky gradient
• Reduced TAA ghosting

Removed Features

• Chromatic Aberration
• PBR Blend