/// <summary>
        /// Initializes a new instance of the <see cref="ConvolutionMaterial"/> class.
        /// </summary>
        public ConvolutionMaterial()
            : base(DefaultLayers.Opaque)
        {
            this.TexcoordOffset = Vector2.Zero;
            this.Scale          = 1.0f;

            this.shaderParameters = new ConvolutionEffectParameters();
            this.shaderParameters.TexcoordOffset = this.TexcoordOffset;
            this.shaderParameters.Scale          = this.Scale;
            this.Parameters = this.shaderParameters;

            this.InitializeTechniques(techniques);
        }
        /// <summary>
        /// Initializes a new instance of the <see cref="AntialiasingMaterial"/> class.
        /// </summary>
        public ConvolutionMaterial()
            : base(DefaultLayers.Opaque)
        {
            this.SamplerMode = AddressMode.LinearClamp;
            this.TexcoordOffset = Vector2.Zero;
            this.Scale = 1.0f;

            this.shaderParameters = new ConvolutionEffectParameters();
            this.shaderParameters.TexcoordOffset = this.TexcoordOffset;
            this.shaderParameters.Scale = this.Scale;
            this.Parameters = this.shaderParameters;

            this.InitializeTechniques(techniques);
        }