private void DrawFinal(Camera c)
{
FinalShader.Parameters["color_map"].SetValue(color_target);
FinalShader.Parameters["normal_map"].SetValue(normal_target);
FinalShader.Parameters["depth_map"].SetValue(depth_target);
FinalShader.Parameters["InvertViewProjection"].SetValue(Matrix.Invert(c.View * c.Projection));
FinalShader.CurrentTechnique.Passes[0].Apply();
quad.Render(Device);
}