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Alpha Channels with text

Posted: Sat, 22nd Nov 2008, 5:58am

Post 1 of 8

spydurhank

Force: 1956 | Joined: 24th Jun 2008 | Posts: 1357

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Using Gimp, does anyone know how to export files so they can be used in FX with an alpha channel. Trying to use the object mask composite tutorials in the support forums. I've got the steps right in vision lab but I'm having trouble in gimp with text. i want to have a title and do that awesome thing in the tut with the flames showing through the f x logo. the entire background as well as the text is opaque. thanks for any help.
Posted: Sat, 22nd Nov 2008, 7:02am

Post 2 of 8

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

In Photoshop, here's the easiest way to do it; I'd think it would work the same in Gimp:

Open a new file at the resolution of your project (or bigger if you want room to animate within the frame). Create a new layer with the text you want.
Delete the background layer.
Save as a PNG.

From there you ought to be able to open it in VisionLab and use the alpha as needed.
Posted: Sat, 22nd Nov 2008, 7:06am

Post 3 of 8

spydurhank

Force: 1956 | Joined: 24th Jun 2008 | Posts: 1357

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awesome axemen and thanks. there was another post that i just found on this subject a while back which i commented on and thought that i understood but apparently not ha ha. i have photo shop but wanted to use gimp so i don't get burned out plus they have a lot of the same features. but thanks again.
Posted: Sat, 22nd Nov 2008, 7:13am

Post 4 of 8

spydurhank

Force: 1956 | Joined: 24th Jun 2008 | Posts: 1357

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dude you are the man i just tried it and that was exactly it, not brown nosing but you rock brother. i would have spent who knows how many hours trying to figure it out. I've been at this since 12:30 and it's now 2:12 a.m. wow i shoulda asked earlier ha. thanks
Posted: Sat, 22nd Nov 2008, 8:25am

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Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Good deal, glad you got it working. I actually use the same technique for creating textures for the particle generator, and most other cases where I need an alpha channel. Just keep whatever artwork or text you create on a separate layer, and when you delete the background you are good to go.
Posted: Sat, 22nd Nov 2008, 9:08am

Post 6 of 8

spydurhank

Force: 1956 | Joined: 24th Jun 2008 | Posts: 1357

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very very cool, i appreciate it a ton. so you can make a texture out of any image as long as its got alpha?
Posted: Sat, 22nd Nov 2008, 9:22am

Post 7 of 8

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Just about. They will get resized to a resolution of 512 x 512 by VisionLab, so its best to start with that resolution, (or 256 x 256) if you are planning on creating a texture, to make sure it appears just how you intend. And there are some rules to keep in mind which control how the texture receives the color you assign to the particles, which I explain briefly in the notes at the end of this tutorial.
Posted: Sat, 22nd Nov 2008, 11:00am

Post 8 of 8

spydurhank

Force: 1956 | Joined: 24th Jun 2008 | Posts: 1357

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Gold Member

nice i remember reading that tut a while back but I'll have to read it a few more times to make sure i totally understand it. thanks