Hey, trying to mix two textures together so i can texture paint the layer below as a path for walking or whatever but not sure how to set it up
Right off the bat, I can see that you have Red lines- this means that data is not flowing along that wire. In this case, to fix it, put a Shader to RGB node on each of those Red wires 
Generally, you don’t need 2 shaders to do this, you can very easily mix textures with just one (which will save you computation and render time):
In your case, you are mixing different shaders, which is totally fine. You just need Shader to RGB nodes, or you can use the Mix Shader node instead of the Mix RGB node
Alright, i did this what you had PrintScreen of to begin with
but when i enter Texture Paint nothing is happening when i am painting?
am i supose to click another button or something to make it re-render afther i painted?
Go to the Texture Slots menu and check that you’re painting on the masking image
oh, now it works but not in real time?
i have to go in and out of texture paint to see the result?!
Is there a way to make it work in real time?
It should work in real-time 
are you using Eevee or Cycles?
Forget it in Evee viewport it works in real time! 
Thank you so much for taking the time to help me out! your a saint!
Awesome, you had me confused for a second there, I was racking my brain thinking “why wouldn’t it be real-time?” 
glad it worked! good luck!
hahaha my bad, just me replying too fast before i tried to troubleshoot it my self,
Getting too eager haha xD
If you plan on doing a lot of texture painting, esp if it involves masking off multiple materials, you might want to check out the add-on “PBR Painter”.
also here’s a free material I just made if anyone wants a concrete material that isn’t totally boring…:
https://drive.google.com/file/d/1c4qC-tq4bBcVouW4xADGCnvsEnfUkMU7/view?usp=sharing
Awesome, thanks for leting me know!
And thanks for the free material as well 
