I just get a black screen.

[qomiter]

WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> ERROR: Invoking <bound method SceneCanvas.on_draw of <SceneCanvas (PyQt5) at 0x2218d137400>> repeat 16 WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> ERROR: Invoking <bound method SceneCanvas.on_draw of <SceneCanvas (PyQt5) at 0x2218d137400>> repeat 32 WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> ERROR: Invoking <bound method SceneCanvas.on_draw of <SceneCanvas (PyQt5) at 0x2218d137400>> repeat 64 WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> ERROR: Invoking <bound method SceneCanvas.on_draw of <SceneCanvas (PyQt5) at 0x2218d137400>> repeat 128 WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0> WARNING: Error drawing visual <Volume at 0x221d7a439d0>

[qomiter]

pip install pyopengl fixed it.

[jonnyhyman]

Changed readme to make it clearer