For information of any AMD GPU user. Looks that is a bug of UNITY on Linux with AMD cards. Not a problem of AMD GPU cards being better or worse. On (970 GTX) Nvidia 440.100 drivers, you could sometimes get it to show that same black image but after switching (read. multiple times) settings you could get it working again. And yes, this is Unity doing OpenGL wrongly, it draws the picture's in wrong order, this is what Mesa/X developers have explained in a bug report (can't remember what report it was) when somebody complained about a similar issue to them, from another game.