Applies to: Client
On Windows, you can use DirectX for rendering or OpenGL. On macOS, you can use Metal or openGL. On Linux, you're limited to OpenGL. Here are the options for renderer:
DirectX 11 is on if the setting says:
client_renderer=0
DirectX 9 is on if the setting says:
client_renderer=2
OpenGL is on if the setting says:
client_renderer=1
Metal is on if the setting says:
client_renderer=3