Alpha doesn't work

Hello,

I've just written the simplest of functions, and it doesn't work...
I was trying to create a window with an alpha channel. The window is a sprite.
The action is:

action env_Glass01()
{
set(me, TRANSLUCENT);
my.alpha = 50;
}

This works, but as soon as I set the alpha below 50, the window becomes invisible. All values higher than 50 work fine.
Does anyone know how this is possible?

Thanks,
Roy

PS. I have version 7.84

What do you mean with "window"? You dont can add a action to a "window".
You use panels or you mean the enginewindow?

I mean a window, like in a house.
It's a transparent glass plate, through which you can look

he means window as in building windows

check d3d_alpharef from the manual

I think it is an action attached to an entity like a glass or?
maybe u just cant see it below 50?

Thanks Quadraxas, it works!
By setting that variable to 0, I can use every alpha value.
Isn't it somewhat strange that d3d_alpharef is by default set to 270? Does it have a reason?

Default 270?
Its default is 128 i think, since its only possible between 0 and 255.
Why 128? Because its just the middle^^