Translations:Std ToggleClipPlane/12/en

Another possibility would be to leave the Lightning Two Sided and change the color of the inner solid by activating Menue Edit --> Preferences --> Display Enable backlight color. But with this the shading effect will be still there. See Forum Thread http://forum.freecadweb.org/viewtopic.php?f=3&t=4371&start=20#p94850