Why can't I see the whole list of textures using stencils in Texture Paint?

I can see and select only a few of the textures to use as stencils (while in the UV panel I can select all of them). I have tried to connect the one that I want to use in the node of the material, but it doesn’t add it to the list. I’ve also saved the work.
So, how to have my beloved texture in the list?

what render engine? screenshots would be nice.

if your talking about internal, then to get your texture stack with the node editor, make sure you have the material node selected. textures in the node editor do not appear in the material texture stack.

Ah. Yes. Right. Sorry. Thanks. :o