If you need SD, HD and FULLHD textures without loosing quality and you use Adobe Illustrator then this package is right for you.
Adobe Illustrator AI->SVG->PNGs
Is a workflow tool that helps you to take Adobe Illustrator (.ai) save it there as (.svg) and generate with SVG2PNGs textures you need for your 2D or 3D games.
SLICES AS IMAGES
It works with slices, so it means you can define in one Adobe Illustrator file slices that represent your textures and in SVG2PNGs tool you can export them as individually sized PNGs without loosing image quality as it comes from SVG standard.