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Hi All.I need a little help.I ported a glow shader from CG.This is not a post process effect ,but applied directly to the object.The whole process of glowing is done in a single pass using only input colors.I need to add another pass with Texture input so that I can have an object textured with glow effect surrounding it.I added such a pass but it seems that the glow pass still overlays the texure.I suppose it is due to the fact that I transform the glow into view matrix so that it always faces the camera.And because I don’t do this for the texture pass ,I believe ,that is the reason the texture pass is not seen to the camera .So here is the shader code:

  Shader "Custom/GlowShader" {
    	Properties {
    		_MainTex ("Base (RGB)", 2D) = "white" {}
    	///	_Color ("Main Color", Color) = (1,1,1,0)
    		_Inflate("Infalate", Float) = 0.5 
    		_GlowColor ("Glow Color", Color) = (1,1,1,0.5)
    		_GlowExpon ("GlowExpon", Range(1.0, 7.0)) = 0.1
    	}
    	SubShader {
    	Tags { "RenderType"="Opaque" }
    	//LOD 200
    	Tags { "Queue" = "Transparent" }
            Pass {
               Blend One One
             
                SetTexture [_MainTex] {    combine  texture,  texture}
            }
            
    	    Pass {
    	   // Blend One One
    	   Blend SrcAlpha OneMinusSrcAlpha
    		// Blend DstColor Zero 
    		CGPROGRAM
    		#include "UnityCG.cginc"
    		#pragma vertex vert
            #pragma fragment frag
    
    		sampler2D _MainTex;
    		uniform float _Inflate;
    		uniform float4x4 ViewIXf;
    		uniform float4 _GlowColor;
    		uniform float _GlowExpon;
    		
    
    struct appdata {
        float4 vertex : POSITION;
        float4 UV:TEXCOORD0;
        float4 Normal :NORMAL;
        float4 Tangent :TANGENT;
       // float4 Binormal :BINORMAL0;
       
    };
    struct gloVertOut {
        float4 HPosition	: SV_POSITION;
        float3 WorldNormal	: TEXCOORD0;
        float3 WorldView	: TEXCOORD1;
    };
    
    
    gloVertOut vert (appdata IN) {
        gloVertOut OUT = (gloVertOut)0;
        OUT.WorldNormal = mul(UNITY_MATRIX_IT_MV,IN.Normal).xyz;/////UNITY_MATRIX_IT_MV =WorldITXf
        float4 Po = float4(IN.vertex.xyz,1);
        Po += (_Inflate*normalize(float4(IN.Normal.xyz,0))); // the balloon effect
        float4 Pw = mul(_Object2World,Po);///_Object2World =WorldXf
        OUT.WorldView = normalize(float3(ViewIXf[0].w,ViewIXf[1].w,ViewIXf[2].w) - Pw.xyz);///ViewIXf=ViewInverse
        OUT.HPosition = mul(UNITY_MATRIX_MVP ,Po);//WvpXf=UNITY_MATRIX_MVP
        return OUT;
    }
    float4 frag( gloVertOut IN ) : COLOR {
        float3 Nn = normalize(IN.WorldNormal);
        float3 Vn = normalize(IN.WorldView);
        float edge = 1.0 - dot(Nn,Vn);
        edge = pow(edge,_GlowExpon);
        float3 result = edge * _GlowColor.rgb;
        float4 texcol= tex2D (_MainTex, IN.WorldView);
        return float4(result,edge);
       //float4 res=float4(result,edge);
      //  return texcol*res;
    }
    
    		
    		ENDCG
    	}
    	 
    	}
    }

Additionally one has to add a MonoBehaviour script to the glowing object with the following script.It is needed to get View Inverse Matrix into the shader ,without which the glow effect will not face the camera.

using UnityEngine;
using System.Collections;

public class GlowScript : MonoBehaviour {

	// Use this for initialization
	public Camera cam;
	//GameObject camera;
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		if(cam){
			 Matrix4x4 viewm=cam.cameraToWorldMatrix;
			Debug.Log(viewm);
	         renderer.sharedMaterial.SetMatrix("ViewIXf",viewm.inverse);
		}
	
		
	}
}
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Matrix4x4 scaleOffset = Matrix4x4.TRS( new Vector3(0f,0f,0f), Quaternion.identity,new Vector3(0.5f,0.5f,0.5f));

//renderer.sharedMaterial.SetMatrix(“ViewIXf”,viewm.inverse);

renderer.material.SetMatrix( "ViewIXf",scaleOffset *cam.projectionMatrix *cam.worldToCameraMatrix *transform.localToWorldMatrix );