As mentioned every panel is different. But HDTVtest settings below.
You need to enable advanced calibration. 3D and 2D settings:
Also you need to do this for EACH input, DVB, HDMI1,2,3 etc as it saves different settings for each input.
Be warned, there is no confirm on the reset menu option, I've hit it by accident and had to redo the settings!
Quote from: 3D Calibrated Settings
HDTVtest.co.uk 3D Calibration Settings for Panasonic TX-P42ST50
Viewing Mode: True Cinema
Contrast: set to FULL and then reduce by 8 clicks
Brightness: set to ZERO and then increase by 30 clicks
Colour: set to ZERO and then increase by 24 clicks
Sharpness: 0
Vivid Colour: Off
CATS: Off
P-NR: Off
Advanced:
White Balance: -12 3 4 16 7 -25
Colour Management: -11 -5 0 14 1 0 6 0 0
Gamma: 2.4
Intelligent Frame Creation: Off
3D Refresh Rate: Auto (see the notes in our review regarding this for bright rooms)
16:9 Overscan: Off
Pixel Orbiter: Auto
Quote from: 2D Settings
2D Settings for Panasonic TX-P42ST50
hdtvtest.co.uk
Viewing Mode: True Cinema
Contrast: set to max then reduce by 14
Brightness: default
Colour: reduce by 2 from default
Sharpness: 0 or 1 click from the left
Vivid Colour: Off
CATS: Off
P-NR: Off
Advanced Settings
White Balance: 3 -2 4 0 -5 -4
Colour Mgmt: -9 -2 0 11 -6 3 0 0 5
Gamma: 2.4
24p Smooth Film: Off (for Blu-ray)
Intelligent Frame Creation: Off, Min if you have trouble with double images on 50hz
16:9 Overscan: Off
Pixel Orbiter: Auto