I noticed that what I included in my post Introducing… does not look the same on my monitor as it does on my friends’ monitors. While I expected some of that, I observed that the effects of interest were not at all visible, particularly the posterization. To solve that, here’s a quick comparison, done by taking a photograph of my monitor. In the left photo I have color management on, but the mode is set to “display”. The right photo is set to “proof” mode, with the output device emulating the Costco glossy prints. See Dry Creek Photo for a variety of lab profiles.