Originally Posted by Light Illusion
The calibration profile should have little difference on the 'clipping point' (contrast) as was the original question, wasn't it???
Colour (chromaticity ) is and should be separate.
3D modes in consumer video displays are typically TOTALLY different than 2D modes. Most of them set Contrast to a very high setting (and if LCD, they set the backlight to a high value, often Maximum) and there can be many other differences between the display's 2D and 3D modes - 3D modes may even have a wider (uncalibrated) gamut because the manufacturer is trying to make the display brighter.
Saying "it shouldn't be different" is like saying you "shouldn't" have to calibrate consumer video displays. In the real world of consumer video displays, the setting the Contrast control clips at (if the display clips at all -- many never clip) is often different in 2D and 3D mode. If the display never clips in 2D mode it typically won't clip in 3D mode either, but there's no guarantee since the manufacturer may change MANY things in the process of trying to make 3D mode satisfyingly bright.
Manufacturers do try (different levels of success, of course) to compensate for the color shift caused by the 3D glasses. That and the changes they make to maximize the light output of the display in 3D mode, make 3D modes quite different to work with than 2D modes. In some cases, 2D and 3D mode are as different as 2 completely different TVs or projectors.
Nobody (that I'm aware of) thinks that 3D discs are mastered to a different standard than 2D... Rec 709 applies to both 2D and 3D modes but all the "non-disc" issues in getting 3D images on consumer video displays often (tempted to say 'always') result in very different calibrations for 2D and 3D modes so that you get the same Rec 709/2.25 Gamma/low error viewing experience for both 2D and 3D modes.Edited by Doug Blackburn - 1/4/13 at 6:15pm