Portal texture

[xandaxs]

Hello folks!

I've got a portal texture I've put together and edited (for a jump map this is). But for some reason it is transparent when I don't want it to be.
I believe the shader is correct so i don't really know what's wrong.

Here's the texture:


And here's the shader:

Code: Select all

textures/axanjumps/portal
{
    qer_editorimage textures/xanjumps/portal.tga
    cull disable
    //surfaceparm trans   
    surfaceparm nomarks   
    surfaceparm nolightmap
   surfaceparm nonsolid
   surfaceparm noimpact 
   surfaceparm alphashadow
    //nomipmaps
          {
      clampmap textures/xanjumps/portal.tga
       tcmod rotate 25
        blendFunc add
       rgbGen identity
   }
}

[Rayne]

You're using blendfunc add, that's why it's transparent.

[xandaxs]

oh -.-
thanks

[xandaxs]

After removing the blendfunc add, the alpha part turned black ig :/

[vulture]

do a normal "blendFunc blend" like I mentioned on irc yesterday...

[Rayne]

Blendfunc add is very similar to color dodge blend mode in photoshop. So 2 bright pixels will give an extra bright pixel. That's why we use that blenfunc for stuff like fire.
Blendfunc add is similar to overlay blend mode in photoshop. And it's best for smoother alpha blends.
Blendfunc fliter is similar to multiply blend mode in photoshop. Lightmaps are applied to a surface via this blendfunc.
There are other blendfuncs but these 3 are basic.

[johnnyenglish]

Rylius added this funky cheatsheet for blends

Wiki Blendmodes - so you can visualise how it might work.