Hello again, so i wanted to go with the Expresso solution. I am trying it, but it somehow doesn´ t work. I open an Expresso tag on a Null object, put the coloured materials there and the material with the transparency. I wire them like you did, but when i play with the master transparency, it doesn t reflect to the others as well.
Could you please walk me through it? I am sending a screenshot as well, where i am trying to get it right.