I assume you are talking about this:
Correction matrix to map plasma EDR based correction to JETI 1211 by Zoyd
1.085195 0.009410 -0.003509
0.003101 1.086654 -0.000754
-0.008047 0.014608 1.063265
Yes I did actually use that, but I never moved my contrast control from the default of 36 after I read this from David Mackenzie here http://www.hdtvtest.co.uk/news/panas...1204101757.htm
"The menus look the same as they have since the 2011 redesign, but we found that on the ST50 plasma, one of the controls worked differently: the [Contrast] control allowed us to increase the brightness of the images put out by the Plasma panel, so, the first thing we did on the TX-P50VT50 was to try the same thing. We were disappointed to see that this didn’t work on this HDTV, when it’s set to the [Professional] modes. This means that the [Contrast] control on the Panasonic VT50 series, in the most useful picture modes, is basically useless, and only serves to reduce detail in bright areas if turned up. The [Professional] modes are capped at a peak white brightness of around 82 cd/m2 (when measured with a standard window pattern). By contrast, we were able to get around 130 cd/m2 out of the cheaper ST50. More on light output later in the review."
I did not notice it, but the matrix corrected the cd/m2 upwards by 7 to 87.8. Using it with a simulated sensor and no offset or errors shows brightness 108.9 cd/m2 for the 100% stimulus.
Thanks guys for all the tips. I guess I will start a new calibration with a the high end of a two point and then proceed with a ten point pushing it until it clips and back off a bit and and also look at the 5, 15, 25... points for fine tuning. If the 5 starts misbehaving in red as reported here and there then I will fix it with the low side of the two point controls. I will also play a bit with the contrast control and move it towards 45 instead of the default 36. As and experiment I might just even plot the effect of the two point calibration controls to see what they do when they are jacked up or down by 5 for each primary.