Hahaa!! We have a winner! 
It never even occurred to me that the world position node could have options so I never even looked at its settings tab.
Yes now it works perfectly. Awesome!
Very cool its going to be fun to get stuck in later and do the real thing.
Here’s a picture of the second straight up material with only the renderTarget texture hooked in:
Thank you very much again for helping me with this!
Cheers