Where are the default shader files located?

Hey… This sounds so easy, but I have no idea how to modify the default shaders.

All I want to do is turn backface culling off. Nothing special… just simple- imperfect lighting on an illum shader with max rendering efficiency.

I thought I was supposed to find the default shader somewhere and then modify it, but the problem is that I have no idea where unity keeps their default shader files. I’m on a windows machine btw.

Just stumbled upon this question and found the shaders here:
Click the dropdown icon for your platform and download the “Built in shaders”.

They are built-in, which means they are in some dll (I suppose, anyway you can’t modify them). However, you can download them here. Copy the one you need inside a new shader, make the modification an you’re good to go.