We Need A Standard Layered Image Format
TIFF, <a href="http://en.wikipedia.org/wiki/Tagged_Image_File_Format" rel="nofollow">http://en.wikipedia.org/wiki/Tagged_Image_File_Format</a> has been around since 1993. It supports layers. It supports compression. It supports paged(!) images. It has well-defined supported image encoding formats. It's already supported by all the image editing software you've ever used (from this millennia).<p>We <i>have</i> a Standard Layered Image Format. HURRAY. NEXT PROBLEM, PLEASE.