O3D: Render-Target Sample

// The 4x4 world view projection matrix.
  float4x4 viewProjection : WorldViewProjection;

sampler texSampler0;

// input parameters for our vertex shader
  struct VertexShaderInput {
    float4 position : POSITION;
    float2 texcoord : TEXCOORD0;
  };

// input parameters for our pixel shader
  // also the output parameters for our vertex shader
  struct PixelShaderInput {
    float4 position : POSITION;
    float2 texcoord : TEXCOORD0;
  };

/**
   * Vertex Shader performing basic viewing transformation.
   */
  PixelShaderInput vertexShaderFunction(VertexShaderInput input) {
    /**
     * We transform each vertex by the view projection matrix to bring
     * it from world space to projection space.
     *
     * We return its color unchanged.
     */
    PixelShaderInput output;

output.position = mul(input.position, viewProjection);
    output.texcoord = input.texcoord;
    return output;
  }
  /**
   * Pixel Shader
   */
  float4 pixelShaderFunction(PixelShaderInput input): COLOR {
    return tex2D(texSampler0, input.texcoord * 5) + float4(0.2, 0.2, 0.0, 1.0);
  }

// Here we tell our effect file the functions which specify our vertex
  // and pixel shaders.
  // #o3d VertexShaderEntryPoint vertexShaderFunction
  // #o3d PixelShaderEntryPoint pixelShaderFunction
  // #o3d MatrixLoadOrder RowMajor

Basic Render-Target Example