UE2 - UT2kX Make texture brighter

Hi,
I want to make a certain texture a bit brighter. I don't want it to be unlit because I want it to accept additional lighting.
I tried playing with the Selfillumination settings in a Shader but I can't get it to just brighten the texture up a bit.

Can you help me?

So as selfillumination I have to use the same texture as for diffuse and in selfillumination mask I have to use a mostly transparent texture. Just as opaque as I want the texture to brighten up, right?
I used a color material for the mask and the SI but it didn't work the way I wanted. I'll try and use the color as a mask and the diffuse texture as SI. I'll edit in the results.

EDIT: It didn't work.
Using the diffuse texture as self illumination did nothing at all and when I added the color as a self illumination mask the shader turned white in the texture browser but the surfaces in the map remained unchanged.

I tried that. In the texturebrowser the shader is considerably darker now (maybe because it doesn't show it "unlit" anymore) but on my bsp there is still no change. Not even after a rebuild.

What's even stranger is that even if I change the output blending to invisible there is no change. It changes in the texture browser. Not on my surfaces.

EDIT: I rebuilt again and it works now. Thank you, Wormbo!

It doesn't, but when I brightened up my shader it didn't appear like "unlit + 64 brighter" but like "not-lit + 64 brighter", so essentially it appeared darker than before in the browser.

That would make the texture brighter, yes, but if it is used in the map and recieves no light there it would still be black.