Look at iMac mockups on this page.
Quality of skewed screenshots placed in the mockups are poor. Seems like photoshop knows too little about super-sampling.
I know how to render a 3d model in 3dsmax with good supersampling, but it's a much more tedious work. How can I make screenshots look good in photoshop? 3D layers? Maybe vanishing point? Smart-objects seem to be rendered poorly, very bad supersampling I mean.