private UnityEngine.Texture2D m_texture2d = null;
        private Noesis.ImageBrush m_imageBrush = null;

        /// <summary>
        /// Important!
        /// Texture has to be set as read only in order to manipulate pixels.
        /// 
        /// ---------------
        /// Unity Inspector
        /// ---------------
        /// Texture Type: Advanced
        /// Read / Write Enabled: Yes
        /// 
        /// </summary>
        public void LoadGraphic()
        {
            m_texture2d =
                (UnityEngine.Texture2D)UnityEngine.Resources.Load("Fire.png");
            //ReadImageFromFile(@"D:\Work\Source Code\Unity\Marauders\Assets\Darren\Graphics\Raster\Texture\Fire.png");

            m_imageBrush = new Noesis.ImageBrush();
            m_imageBrush.ImageSource = (new Noesis.TextureSource(m_texture2d));
        }

        public void AlterPixels()
        {
            // TODO: Loop and change many pixels according to algorithm...
            UnityEngine.Color color = new UnityEngine.Color(1.0f, 0.5f, 0.0f, 1.0f);
            m_texture2d.SetPixel(0, 0, color);

            // After looping, then apply changes.
            m_texture2d.Apply();
        }

Noesis.Border border = m_frameworkElement.FindName("m_border_playerHead") as Noesis.Border;
        Noesis.FrameworkElement frameworkElement = border.Child as Noesis.FrameworkElement;
        //Darren.HelmetSilver frameworkElement = new Darren.HelmetSilver(); // Size is 30 x 30
        RenderTexture renderTexture = new RenderTexture(
            32,//(int)frameworkElement.Width,
            32, 0);//(int)frameworkElement.Height, 0);
        renderTexture.isPowerOfTwo = true;
        renderTexture.Create();
        Material material = new Material(shader_heatHaze);
        material.SetTexture("_MainTex", renderTexture);
        //material.SetFloat("Wobble", 0.7f);

        Noesis.TextureSource textureSource = new Noesis.TextureSource(renderTexture);
        Noesis.Image image = new Noesis.Image();
        //image.Margin = new Noesis.Thickness(-50, 0, 0, 0);
        image.Source = textureSource;
        image.Width = renderTexture.width;
        image.Height = renderTexture.height;
        m_player1.Grid.Children.Add(image);
        Noesis.Canvas.SetZIndex(image, int.MaxValue);

Shader "Hidden/HeatHaze"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
		// No culling or depth
		Cull Off ZWrite Off ZTest Always

		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			
			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				float4 vertex : SV_POSITION;
			};

			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
				o.uv = v.uv;
				return o;
			}
			
			sampler2D _MainTex;

			fixed4 frag (v2f i) : SV_Target
			{
				fixed4 color = tex2D(_MainTex, i.uv);
				// just invert the colors
				color = 1 - color;
				return color;
			}

			/*
			!!! IMPORTANT !!!

			Unity GUI
			-----------------
			To make Shader.Find(string name) work perform the following
			Unity Menu > Edit > Project Settings > Graphics
			Under "Always Included Shaders" increase the "Size" by one.
			Assign "Element X" where X is "Size" minus one to the shader.
			Example: "Hidden/HeatHaze"
			
			CSharp Code Behind
			-----------------
			Shader shader_heatHaze = Shader.Find("Hidden/HeatHaze");
			*/

			// Data to pass into shader
			/*uniform float1 Timer;
			uniform float1 Refraction;
			uniform float1 Wobble;*/

			ENDCG
		}
	}
}

Graphics.Blit(renderTexture_source, renderTexture_destination, material);

FrameworkElement fe;
RenderTexture rt = fe.ToRenderTexture();