How do i paint my material layers over my auto landscape material

Hi, I am new to ue4 and am trying to make an auto material, but also want to make it so i can paint layers over it, i can do both of these things individually but i can’t work out what i need to do to make it so i can do both of these things at the same time. Can anyone help me?! Thanks.

i have the same problem :frowning: