protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.BlueViolet);
CurrentGameState.Render(gameTime);
Graphics.GraphicsDevice.SetRenderTarget(null);
GraphicsDevice.Clear(Color.Black);
SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend,
SamplerState.LinearClamp, DepthStencilState.Default,
RasterizerState.CullNone);
SpriteBatch.Draw(renderTarget, new Rectangle(0, 0, Consts.WindowWidth, Consts.WindowHeight), Color.White);
SpriteBatch.End();
Graphics.GraphicsDevice.SetRenderTarget(renderTarget);
base.Draw(gameTime);
}