Managing Graphics for Retinal Display with Adobe Illustrator

After finalizing all the revisions to the 225 graphics for ChatTrack on the regular 320x480 display using Illustrator, it was time to double the sizes and save them with the "@2x" suffix. Since the graphics are read in as arrays with numeric names, they can be quickly processed by the API and iOS for both sizes: 320x480 and 640x960. However, the iOS also controls the gray scale of the buttons on the tab bar. Changing the opacity will lighten them up a bit but the overlapping areas display annoying darker shades. So, we leave them in total black with transparent backgrounds.