Forum: Photoshop


Subject: Saving a layer as an image and an alpha channel.

Ratteler opened this issue on Feb 17, 2003 ยท 10 posts


Ratteler posted Mon, 17 February 2003 at 4:25 PM

Ok. THis is going to get a little complex. I'm trying to do something that has stumped everyone I know. As we know... Photoshop PSD files a frikkin HUGE because each layer is pretty much uncompressed image with an alpha channel attached. Each layer is a 32 bit file, all heaped on top of each other. Jpegs are small, but aside from the lossyness of the format, they have other limitations... NO SUPPORT FOR LAYERS AND NO TRANCPARANCY! So here's what I was thinking.... Since each Photoshop layer is a 32 bit file, isn't there a way to save that layer so the 24bit image and the 8 bit alpha asseperate files, then JPEG both the Image and the Alpha? Now if you do that for every layer, you can make a much smaller JPEG file set that still can be recombined into Photoshop layers for editing. Sort of a JPEGed PSD file? It's still going tobe lossy, but it would be a great tool for 3D texture makers who want the small file sizes, and layers. Any one got any ideas how to do this?