OpenGL

Stub

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Todo: Write about custom OpenGL renderer in

Xash3D/

Paranoia/

Cry of Fear and etc. (

Counter-Strike Neo?^[Clarify])

OpenGL is a 3D graphics API, which is used by the hardware renderers of GoldSrc and id Tech 2, as well as some Source 2 games. It is also used on Source engine, for systems that doesn't support Direct3D ( macOS and Linux).

Id Tech 2 Engine (GLQuake) OpenGL

Screenshot in-game of

Quake GLQuake^[1]^[2], using OpenGL.

Features

Experimented Reflections
Transparent Water
Rudimentary Shadows

Note:To enables Rudimentary Shadows r_shadows must be set to 1

Note:Rudimentary Shadows in Half-Life were add in the 25th Anniversary update.

Texture Filtering
Water ripple
32-bit color
Support for different resolutions

GoldSrc OpenGL

Screenshot in-game of

Half-Life, using OpenGL.

Features

Colored lighting - Quake simply had monotone lighting
Transparent textures - Glass can now be used in maps
Water waves

Note:Water ripple from Quake replace by Water waves but not in Software Renderer the water ripple is used.

Texture Filtering - Quake (GLQuake) simply Texture Filtering

Since 2013 SteamPipe Update

MSAA anti-aliasing - GoldSrc now natively support anti-aliasing, specifically, MSAA 4X, which is enabled by default on most modern hardwares. This will reduce the amount of jagged edges/staircases effect on the geometry.