I'm 74 years old. My35 year-old son and I are developing a game for iOS platform. He's the coder/programmer, and I'm the designer. I've created numerous game elements such as buttons to tap, a logo, and a crossword grid in Photoshop. I set the image resolution at 216 dpi. I understood that I would need to supply 1x, 2x, and 3x versions of these elements. To test a 3x version, I took an element and then, using Photoshop, increased its size by 300% (with resolution remaining at 216 dpi.) The resulting image understandably looks bleary/blurry. Wouldn't any device accessing the 3x versions of the graphics all have blurry elements? Does this mean I should have created all the elements at that largest size, naming it the 3x version, so that subsequent 2x and 1x versions would be reductions, thus retaining sharpness at each stage? I'm an old guy, and not a coder, so please explain this to me keeping those factors in mind. Thank you!