Source Water

Shader pack for Iris that replaces vanilla water rendering with a reconstruction of water from Source Engine games. Its goal is to bring the appearance and behavior of classic Source water into Minecraft without turning the pack into a general lighting or art-style overhaul.

The implementation is based primarily on the Source 2007 renderer, with the 2004 renderer preserved as an optional classic normal-animation mode.

The main inspiration for this pack was a random YouTube video about Chinese cs 1.6 F2P version where some Source graphical features was packported. Such as water!

This project contains AI-generated code. See AI_USAGE.md for details.

Recreated Source behavior

• Source's expensive and cheap water rendering paths, with a distance-based LOD transition between them.
• Material-specific surface and underwater fog colors, fog ranges, refraction, reflection distortion, and normal-map flow.
• Fresnel-driven reflections, three-layer Source 2007 normal movement, and the original 29-frame Source 2004 animated normal map.
• Separate underwater material behavior and optional full-screen water warp.

Adaptations

• Source planar reflection render targets are replaced with screen-space reflections for visible scene geometry and a sky fallback when SSR cannot provide a result.
• Source environment cubemaps are approximated with a light-aware Minecraft sky reflection, including the cheap-water path.
• Source-unit fog distances are converted to Minecraft blocks, while the expensive-to-cheap water transition is configured in chunks.
• Vanilla underwater tint and fog are removed so that the selected Source material controls underwater color and visibility.

Included materials

• Half-Life 2 — Canals 03
• Half-Life 2 — Canals Clear
• Half-Life 2: Lost Coast — ATI
• Half-Life 2: Episode One — Riverbed 01
• Half-Life 2: Episode Two — Riverbed 01
• Half-Life 2: Episode Two — Riverbed 02
• Half-Life 2: Episode Two — Silo
• Half-Life 2: Episode Two — Tunnels
• Counter-Strike: Source — Militia

Pairs especially well with Squake.