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Why are you doubling the resolution for retina displays? I don't understand
Can you clarify?
Amber Cookman12,662 Points
The reason for doubling the resolution for retina displays is because they actually display more pixels in the same amount of space as what is currently considered a more standard display, this is known as pixel density. Some images that look very high quality on a standard display will look pixelated on a retina or high DPI display.
Here is a great article that really succinctly breaks down the why and how behind optimizing images for higher pixel density displays.