A new version 0.5 of the D3DQuake conversion of the Quake source code modified to use Direct3D 7.0 instead of OpenGL is now available. Thanks Ryan Stotts. D3D Quake is GPL, just like Quake, so the source code is also available. Current issues with D3D Quake include requiring 32-bpp textures, an NVIDIA Beta Driver bug makes gun models invisible on GeForce cards, and it crashes on Voodoo3 accelerators after about 60 seconds of play.