LG 50PZ850T Owner's Manual page 55

CAUTION
Some menus may not work while watching the TV in 3D.
y
If used 3D effect on the 2D source, 3D may not work.
y
The 3D imaging mode is disabled automatically when switching DTV channels or input source.
y
The screen may not be displayed properly if you view 2D DTV images in 3D imaging mode.
y
3D effect can be seen when 3D Mode is selected appropriately for the 3D input signal supplied to
y
the TV.
For *mpo files (3D camera files), the 3D imaging mode is enabled automatically.
y
3D may not be displayed properly for some PC graphics cards.
y
55
3D IMAGING