Direct3D

Direct3D is a graphics application programming interface (API) for Microsoft Windows. It is part of  DirectX.

GoldSrc engines ships with a software renderer, OpenGL and initially, Direct3D 7, prior to it being removed in 2013 after SteamPipe update. Unlike OpenGL (since detail textures support was added in 2004 with the release of CS:CZ) and like the Software renderer, it doesn't seems to have issues with overbright lighting.

Source mainly used Direct3D 9 (Shader Model 2) renderer, which later was upgraded to support Shader Model 3.0 (in all games since ), but offers backward compatibility with older GPUs using DirectX feature levels. Some third-party engine branch like Titanfall branch and Strata Source use Direct3D 11 instead. Throughout 2020-2022, nearly all of Valve games also added support for Vulkan renderer on Windows, using DXVK to translates D3D9 to Vulkan. Enabling Vulkan translation will require the "-vulkan" launch option (except in Portal with RTX and upcoming Half-Life 2 RTX).

Source 2 mainly uses Direct3D 11, but also has options to use the Vulkan renderer.

Id Tech 2 Engine (WinQuake) Direct3D

Features

Support for windowed video mode

• Texture Filtering

Missing Features and Limits and Problems

• Rudimentary Shadows
• 32-bit color
• Many resolutions from vanilla quake are not unsupport

See also

• DirectX Versions - list of DirectX feature levels
• OpenGL
• Vulkan, another graphics API, successor to OpenGL.
• Software renderer

External links

•  Direct3D

References

Wikipedia for Quake

Quake Fandom wiki