[žalost (old)]

make your alpha, move it to a new doc and delete that layer from your decal. Flatten your decal document, the right click on the newly flattened layer and hit "add layer mask"

go over to the document containing your alpha channel, ctrl+a to select all, ctrl+c to copy it. Paste it in to your decal document. you should see a difference, and then save it as a 32 bit tga.

textures that use 128 grey and blend on top of a surface do not require an alpha channel.

edit: gimp can be a little gimpy when editing alpha channels. You may have go play around with it.

edit again: on photoshop you can simply paste in the alpha under the channels tab. (this was added for the sake of being linked in the sticky, i am not implying you should get photoshop)

[FaNtM (old)]

KERES I LOVE YOU SO MUCH!!! I GOT A DECAL TO WORK!!!! WOOOOHOOOOOOOOOOOO!!!!!!

[žalost (old)]

you flatten your decal document, right click on the 'background' layer, add layer mask, paste in the alpha. You'll know when you got it.

Once again, just using a 128 grey trans is sooo much easier for overlays. It's really simple. the image should look like this:
http://j.photos.cx/k...decal17-0df.jpg (it is your decal floating over a 128 128 128 grey canvas)

[žalost (old)]

if you are applying a decal shader to an existing decal, just figure out which of the 2 shaders works best on it. There are more technical ways to determine that, but without any photoshop or gimp experience, the easiest way is to compile it with 2 shaders to find out.

edit: feel free to try out the overlay shader (the first one) on that decal i posted, and see how it blends. (that decal is part of my texture pack i am uploading right now)

[FaNtM (old)]

*puts a respect token in keres jar*

keres, you have found a solution to a problem that i've been working on for weeks. there isnt enough that i can do to thank you. the only thing that i can say is: thank you keres, for all that you've done.

[žalost (old)]

Quote

*puts a respect token in keres jar*

keres, you have found a solution to a problem that i've been working on for weeks. there isnt enough that i can do to thank you. the only thing that i can say is: thank you keres, for all that you've done.

ah no problem dude all is good.

edit: hah, i didn't see you had already replied saying you got one to work. gj.

[FaNtM (old)]

i have antoher problem: my decal works just fine. but, whenever i add somethinhg to my shader, and i flush&reload shaders, and then when i recompile, the decal goes away. any ideas?

[NulL]

Look for it with r_showtris 1, are the triangles there? if so it looks like a shader rendering problem. If there are no triangles then it wont have been compiled into the map properly.

[FaNtM (old)]

there are not any triangles where the decal should be. how do i fix this?

[FaNtM (old)]

its wierd! it completely goes away on r_showtris!