Poster looses grunge when imported into vtfedit?

[Sheeplie]

Hi, I've been making posters like the ones from HL2, and I've even done it this way a few times before.
My process:
1. Take a grunge or dissolved texture, make it black and white, slap it into an alpha channel and color select what I want to delete
2. Delete those parts, then copy my image and put it in a new layer over a decal_posterbreen for sizing
3. Remove the decal_posterbreen layer below, save my image as a .png and get it into vtfedit.

Now though, when I import it into vtfedit, I see an absolutely clean version of my image, no grunge, no worn effect, nothing.
I'm not importing over any alpha channels, but I don't think I should have to since I literally deleted those parts of the poster.
I notice that before I Resize my image, it imports fine. This only happens after I resize.

[gnampf]

I've never seen anybody use an alpha texture for grunge, I always just took a grunge texture from cgtextures or what have you, put it directly over the texture, and lower the opacity of the grunge texture until it looks realistic enough.

[Sheeplie]

Sorry, what I'm talking about is a worn-effect on a poster- not actual grunge.

Also, this seemed to be just a glitch with vtfedit's preview, I put it into gmod and it's fine.

[Vincentor]

vtfedit never shows the alpha properly, you have to manually check the alpha channel after importing to see whether it imported properly or not

[Deunan]

[QUOTE=Sheeplie;49123799]Sorry, what I'm talking about is a worn-effect on a poster- not actual grunge.

Also, this seemed to be just a glitch with vtfedit's preview, I put it into gmod and it's fine.[/QUOTE]

Gimp has been known to fuck with alphas in that it removes all colour information in places where an alpha is. Might be the cause.

Also don't use Pngs - use tgas with an alpha channel, rather than just deleting stuff from the RGB channel. (you want RGBA)