Alpha (color) in DX11?

vvvv beta question
1

Actually, the quad in the renderer (screenshot below) below should appear 50% transparent to the red background.
How to activate the alpha?

https://vvvv.org/sites/default/files/imagecache/large/images/alpha_0.jpg

alpha.v4p (3.4 kB)

2

ok, found the answer here: Where is alpha transparency in dx11? - question - Forum