Unity - how to make material double sided

Question

Search for the issue gives a number of solutions, but they don't work for some reason in mine Unity3D 5.4. Like camera inside a sphere

I do not see cull and/or sides in material in Unity editor. In C#

rend = GetComponent<Renderer>();
mater = rend.material;
rend.setFaceCulling( "front", "ccw" );
mater.side = THREE.DoubleSide;

gives no such setFaceCulling and side property.

How to make material double sided?

Answer 1

Maybe my answer for your Unity Version doesn't work, but here it is a solution for newer versions in HDRP in image below

Answer 2

Use or create a shader with

Cull off

Seen here in this simple 2 sided shader:

Shader "Custom/NewSurfaceShader" {
    Properties {
        
    }
    SubShader {
         Cull off   
         Pass {
             ColorMaterial AmbientAndDiffuse
         }
        
    }
}