Double sided geometry.

Questions & Answers
1

Is there a way to set mesh to display both sides? i know i can model it to have both sides but is this the only way?

2

Just set CULL OFF in the shader.

3

I have a Script here. I don’t know if it’s going to work, but you could give it a try. Create a new script in java and then insert the code below. Then you just need to attach the script to the object that you want to have double sides.

Javascript:

#pragma strict

function Start () {
    var mesh = GetComponent(MeshFilter).mesh;
    var vertices = mesh.vertices;
    var uv = mesh.uv;
    var normals = mesh.normals;
    var szV = vertices.length;
    var newVerts = new Vector3[szV*2];
    var newUv = new Vector2[szV*2];
    var newNorms = new Vector3[szV*2];
    for (var j=0; j< szV; j++){
        // duplicate vertices and uvs:
        newVerts[j] = newVerts[j+szV] = vertices[j];
        newUv[j] = newUv[j+szV] = uv[j];
        // copy the original normals...
        newNorms[j] = normals[j];
        // and revert the new ones
        newNorms[j+szV] = -normals[j];
    }
    var triangles = mesh.triangles;
    var szT = triangles.length;
    var newTris = new int[szT*2]; // double the triangles
    for (var i=0; i< szT; i+=3){
        // copy the original triangle
        newTris _= triangles*;*_

newTris[i+1] = triangles[i+1];
newTris[i+2] = triangles[i+2];
// save the new reversed triangle
j = i+szT;
newTris[j] = triangles*+szV;*
newTris[j+2] = triangles[i+1]+szV;
newTris[j+1] = triangles[i+2]+szV;
}
mesh.vertices = newVerts;
mesh.uv = newUv;
mesh.normals = newNorms;
mesh.triangles = newTris; // assign triangles last!
}

4

Just add the "Cull off " property in the subshader.

Like this:

Shader "Custom/Double-Sided" {
	Properties {
		_Color ("Color", Color) = (1,1,1,1)
		_MainTex ("Albedo (RGB)", 2D) = "white" {}
		_Glossiness ("Smoothness", Range(0,1)) = 0.5
		_Metallic ("Metallic", Range(0,1)) = 0.0
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200
		Cull off

		CGPROGRAM
		#pragma surface surf Standard fullforwardshadows
		#pragma target 3.0

		sampler2D _MainTex;

		struct Input {
			float2 uv_MainTex;
		};

		half _Glossiness;
		half _Metallic;
		fixed4 _Color;

		void surf (Input IN, inout SurfaceOutputStandard o) {
			fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
			o.Albedo = c.rgb;
			o.Metallic = _Metallic;
			o.Smoothness = _Glossiness;
			o.Alpha = c.a;
		}
		ENDCG
	}
	FallBack "Diffuse"
}