title: XNA "Texture2D" amalgamation
body: <p>How can I join together multiple Texture2D's into one large Texture2D? I am trying to optimize an isometric tile game by splitting the map up into chunks.</p>
  
  <p>I have tried googling it, and found articles regarding "RenderTarget2D", but am unsure how to implement this.</p>
  
  <p>Thanks, 
  Sam.</p>