Material to-> •Surface through AO has black shader in v.por

[antonarset]

Hi, I am connecting phong to "material" node through AO and it is ok, works, but the preview for the shader is always black. When I have many materials it is very unpleasant even if they have proper names. Also I can't see the changes in material editor. I cant find a way to change this black hole to the real shader. It happened once but I couldnt figure exactly how .