   [XNA] Terrain Texturing
  So, I just wanted to ask about terrain texturing and how the effect edits this. So, I have a piece of terrain in front of me. It is coated with a grass texture. My Question:"How can I draw things onto the Texture"?No the clearest question but I'm not sure how to word it, so I'll try to elaborate.In Most hight map editors you can see where your mouse is in 3D space via a circular ring on the terrain, this moulds around the terrain and allows you to paint.I Guess I want to know: "Is The Ring part of the Texture?" or is it added in as a separate entity?    