Static Objects

[DefXL]

Hello! This is my first post here and of course it´s a question.
I am wondering how you do to make a "static object".
I´ve used cinema 4d to make the .dae file but how do i make the .mat?
I just want to make a decal for the wall or someting and some text.


I´m 13 years old and have made custom stories for about 2 months now so i´m still learning
but i tought it would be fun with some own decals.


I would be really thankfull if someone could tell me how it´s done.
(Sorry for bad english)