FullScreenEffect.cs

using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
public class FullscreenEffetScript : MonoBehaviour
{
    //public Shader m_fullscreenEffectShader;
    Material m_shaderMaterial;
    
    public float m_effectLerp_Amplitude = 2;
    public float m_effectLerp_Frequency = 1;


    public float m_effectRangeMultiplier = 42.0f;
    [Range(-1, 1)]
    public float m_effectScaler = 1;

    [Range(0,1)]
    public float m_cameraBackgroundWhite = 0.027f;
    Camera m_camera;

    void Awake()
    {
        m_shaderMaterial = new Material(Shader.Find("Hidden/NewImageEffectShader"));
        m_camera = GetComponent<Camera>();
        m_camera.depthTextureMode = DepthTextureMode.Depth;
        m_camera.backgroundColor = new Color(m_cameraBackgroundWhite, m_cameraBackgroundWhite, m_cameraBackgroundWhite);
    }

    void OnRenderImage(RenderTexture source, RenderTexture destination)
    {
        m_camera.backgroundColor = new Color(m_cameraBackgroundWhite, m_cameraBackgroundWhite, m_cameraBackgroundWhite);
        // set variables here
        m_shaderMaterial.SetFloat("_EffectLerp", m_effectLerp_Amplitude* Mathf.Sin(m_effectLerp_Frequency * Time.time));
        m_shaderMaterial.SetFloat("_EffectScaler", m_effectRangeMultiplier * m_effectScaler);
        if (m_shaderMaterial != null)
            Graphics.Blit(source, destination, m_shaderMaterial);
    }




}