What are you trying to do with the alpha channel? Just a transparent background? Are you drawing something on the alpha channel in photoshop? Just adding one doesn't really do anything, the alpha channel has to have , pixel data too, just like the rgb channels.
If I want to make a jpg transparent in parts I usually just unlock the background layer and then erasing it or magic wanding it or quick masking or however you want to make something transparenty-like will work. Make sure you see the "checker-box" pattern to know its transparent, if its still white or a color its not transparent. Then just save it as a normal png, I don't know what a superpng is. --- On Wed, 6/10/09, Bjorn Samuelsson <bjorn_...@hotmail.com> wrote: > From: Bjorn Samuelsson <bjorn_...@hotmail.com> > Subject: RE: [pygame] Alpha channels and per pixel alpha > To: pygame-users@seul.org > Date: Wednesday, June 10, 2009, 6:03 PM > > > > #yiv1831619233 .hmmessage P > { > margin:0px;padding:0px;} > #yiv1831619233 { > font-size:10pt;font-family:Verdana;} > > > > Ok. > > Could you possibly give me some short instructions on > how to make a simple image with alpha channel > so maybe I can see what I'm doing wrong. > > This is how i do it: take a regular image in photoshop, add > an alpha channel, save as a SuperPNG with the > "alpha channels" box checked. > > I'm not really sure how to check if I have a > "working" alpha channel or not. But when i reopen > the image in photoshop the alpha channel is still > there. I also tried a small application that gives out > information about a given png-file and it said that the > image is 32-bit RGB+alpha, non-interlaced. > > > > From: geometr...@gmail.com > Date: Wed, 10 Jun 2009 14:48:58 -0700 > Subject: Re: [pygame] Alpha channels and per pixel alpha > To: pygame-users@seul.org > > The way to do it is with .convert_alpha() > Check that your images really do have an alpha channel. > > check out the rest of the Windows Live™. > More than mail–Windows Live™ goes way beyond your > inbox. > More > than messages >