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.

Source Water

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.

Source Engine Water

Source Water

Recreated Source behavior

Adaptations

Included materials

Versions

Source Engine Water

Source Water

Recreated Source behavior

Adaptations

Included materials

Versions