I purchased an ASUS PA329Q monitor to replace an NEC LCD2490WUXi2. I set up both monitors side-by-side and calibrated them to the same parameters (sRGB, D65, 150nit, gamma 2.2) using an X-Rite i1Display Pro and ProArt Calibration v1.07 for the ASUS and SpectraView v1.1.34 for the NEC. The colors displayed by Lightroom do not match -- not even close. Since I've successfully soft-proofed prints with the NEC for years, I trust its color accuracy. After much experimentation I've determined that ASUS ProArt Calibration does not generate or update an ICC profile, as do SpectraView and X-Rite i1Profiler. Without an accurate ICC monitor profile, how can color-managed applications such as Lightroom or Photoshop possibly render the proper colors?
The color output must be normalized to be true.
This can happen in two different ways:
- On the computer through the software.
- On the screen by the hardware.
Higher-end screens often have a LUT (Look-up Table) that can be changed. This will do the color correction in the screen itself.
The monitor details say that it is"factory pre-calibrated for outstanding color accuracy" and the specification states that it has the ability to use a 14-bit LUT.
Lightroom can send uncorrected Adobe RGB and the monitor corrects it. Additionally, Lightroom and the monitor must both be using the same mode (Adobe RGB, SRGB etc.) or the wrong LUT will be applied.