DX11 texture, how to set alpha

hi guys! if I have a spread of textures, there is some way to set the alpha (transparency) for each ones?

in the example I’m changing the “saturation” for each textures… I’m looking for some node that can do the same for the alpha

(I know that here I should change the alpha color in quad: my case is way complicated, this is just to show what I mean)

setalpha.v4p (10.6 kB)

In the HSCB filter, the output alpha is the same as the alpha from the input, if you want to set the alpha, you will have to do it before the HSCB or write another filter with input pin alpha.