Like Ace mentions UV (texture) space starts with the upper left corner of your texture being placed at 0,0. Positive U is to the right, positive V is down. One image is mapped to one unit square of UV space by default. So 0.5,0.5 is the middle of the image. Things to remember: Uv space is infinite. Your texture has options…
Thank you so much for putting this into perspective guys! Huge thanks to you, Vailias for taking the time to put together that detailed description and diagram. This helps a lot. Here's what I ended up with in the end: I was having issues with getting the position down with just the one vector 2 parameter as it seemed to…