Right, you don't need to necessarily have a pixel = vert ration depending on the image content, but in a situation where you don't have pixel level detail you could just use a smaller texture too. The bigger point I want to make is that displacement is a poor option for high frequency detail, that is much better done with…
It really depends what technique you use, which I think is the point of bringing up RCSM as a method. By bringing up pancaking I think you're thinking of POM shortcomings. There are tons of ways to fake depth, some expensive some cheap, and I think it's (currently) better to keep those options in mind than to just…