Alpha rendering

hi..

I create with positioncolored vertices a simpe Triangle. One of the vertices has a "0" as alpha value. The other 2 are red. So I expect to have a triange which is transparent on a vertex. But I dont have it. What so I do false? Probably I have to change device.renderstate.alpha.... Can you pls help me..

Thanks...

MAT

[402 byte] By [M.A.T] at [2007-12-23]