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Halford
09-27-2006, 11:23 AM
Hi Everyone,
my workplace just moved to Photoshop CS2, since then I have a small problem.

I open as usual the images imported by our camera. I draw a mask on them to make an alpha channel to use them in compositin in combustion as usual. I save the image in tga32Bit. the issue is that it does not contain the alpha. If I reopen the image, instead of been trasparent is all white where it should be masked.

To have my tga with a mask I had to work on my jpg, save it as tga 32bit but keep the original open, open the saved tga, go into the chqnnels and select the alpha (that is all white) and paste the work from the original file that still open...

What is going on? it worked well on PS CS, what happened in the CS2?

I'm not the only one, the 3 machines with Photoshop react in the same way.

Ever encountered this?

Hal.
Jaycee77
09-27-2006, 01:06 PM
There is a sticky in this forum which covers this issue I believe located here:

http://forums.cgsociety.org/showthread.php?t=123330
Halford
09-27-2006, 01:12 PM
I saw that, it covers PS 7. and it says as well that the problem is fixed in CS and CS2.
The problem is not exactly the same as I do not have even the transparency.

Hal.
vaXn8d
09-27-2006, 08:22 PM
I ran through this but didn't have any issues... I made a new document, filled it with a color, make a mask, made an alpha channel from the mask, then hit save as (alpha channels checked, 32 bits/pixel). I reopened the document and my alpha was there. Now my background layer wasn't transparent, but the alpha channel itself was still in tact.
halo
09-27-2006, 09:19 PM
are you saving as 24 bit or discarding the channels when you save?
Halford
09-27-2006, 09:36 PM
I'm doing it iun 32bit, but the alpha channel is greyed out unchecked as soon as I choose tga.

Hal.
vaXn8d
09-27-2006, 10:06 PM
Are you making an alpha channel (in the channels pallette) and not just making a mask for your background layer?
halo
09-28-2006, 12:25 PM
I'm doing it iun 32bit, but the alpha channel is greyed out unchecked as soon as I choose tga.

Hal.

can you check it?

post a screenshot, this doesnt sound right.
xott
10-02-2006, 06:35 PM
Hello all lets see if I can shed some light here

Transparancy channel is not the same as alpha channel photoshop handles these two channels differantly
trancparancy = the checkered background that you see on your document
alpha = the extra channel red, blue, green, alpha that is black, white and shades of gray

if your used to saving TGA files with a trancparancy channel (checkered Background) but photoshop is giving you a white background, fear not there is a solution to your problem

first
navigate to : C:\Program Files\Adobe\Photoshop CS2\Plug-Ins\File Formats

inside is a "Targa.8BI" file

COPY THIS FILE somewhere OUTSIDE of your photoshop folder

second find a computer that is running PS7 or ANY computer with Photoshop that handles TGA's the way you want then

navigate to : C:\Program Files\Adobe\Photoshop x.x\Plug-Ins\File Formats

inside is a "Targa.8BI" file

move a copy of this file over to the same location on the computer that your tring to fix

IMPORTANT : DO NOT OVERWRIGHT YOUR ORIGINAL PS CS2 VERSION OF THIS FILE MOVE THE ORIGINAL AS STATED ABOVE

Shut down PS CS2 then you should be good

if there are questions please ask It took a while of reading searching and trials to figure out what Abobe had done, and I'd hate for other pros to suffer for adobe's muck up

fyi Iwould go more indepth but work call latter all
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