The Original Gay Porn Community - Free Gay Movies and Photos, Gay Porn Site Reviews and Adult Gay Forums

  • Welcome To Just Us Boys - The World's Largest Gay Message Board Community

    In order to comply with recent US Supreme Court rulings regarding adult content, we will be making changes in the future to require that you log into your account to view adult content on the site.
    If you do not have an account, please register.
    REGISTER HERE - 100% FREE / We Will Never Sell Your Info

    To register, turn off your VPN; you can re-enable the VPN after registration. You must maintain an active email address on your account: disposable email addresses cannot be used to register.

Photoshop (CS) Alpha Channel Help

bigpimpboy14

bigpimpboy14

On the Prowl
Joined
Apr 20, 2004
Posts
130
Reaction score
0
Points
0
Location
Hialeah
Hey all,

I made logo in Adobe AfterEffects, which i exported as a targa (*.tga, I've always used targa because it contains an alpha channel, and when i import the graphic still into Adobe Premiere, everything works fine and dandy).

Now, I would say that I'm an intermediate Photoshop user, so I can get things done, but not all. My trouble is that when i open the targa into Photoshop, I see the logo, and behind it is a black background. My issue is that I can't figure out how to get rid of the black background. My logo contains transparencies, so I can't just erase it with any tool. And when I look at the channels, the alpha channel is clearly there. So I'm not sure how to make the alpha channel do it's thing.

Photoshop help is, ironically, not helpful, and neither was google... ::sigh::

PS: It says "SHINE" for anyone who's wondering.
 

Attachments

  • layers.jpg
    layers.jpg
    76.1 KB · Views: 75
Yea. I wish I was a photoshop God like some of the people on here, but...ya know... you do what you can, lol.
 
That's why you usually use the PNG format for images with alpha transparency.
 
Yeah, what Paws said.

Isn't targa a bit, um, dated?
 
Targas are virtually an industry standard in the video/motion graphics world.

All you need to do is load the Alpha, invert it, then delete the background pixels.

Step by step:

Open the TGA file in PS.

If there is only one layer and it is labeled "Background", you need to convert it to a standard layer, as Background's transparency is locked. To do so, double click on the background layer icon in the layer palette, rename if you want to, and hit OK.

Go to the Channels palette. Drag the Alpha channel icon onto the "Load Channel As Selection" button - it's the left-most icon at the bottom of the Channels palette, looks like a little circle of dots.

You should now see marching ants on the image around your object. Choose Select/Inverse to invert the selected pixels.

Press Delete. All the background pixels should now be removed.



Of course, you could avoid this whole process by saving a layered PSD out of After Effects:

Composition / Save Frame As / Photoshop Layers.
 
I use to do all my .tga files and transparencies by hand, but then I found a cool plugin that does them for me! If you want it, PM me your email and I'll send it to you. All you do is save it as a .tga and it converts the transparent parts to transparencies for you.
 
I think "dated" was the wrong word...
 
Corny said:
Um no .. it's not lossy, has alpha channel .. perfect for everything professional :)
Click to expand...
The "PNG-24" format that you can choose in Photosoup is non-lossy too.
 
You must log in or register to reply here.
Back
Top