aaron is right. There is a recessive Desert ghost project that Nerd and the Bells are working with.
The Desert Pastel was Stan Chiras' project and now is Pro Exotics. Of course, Pete kahl is also working with his own Desert pastel line and Both lines of Desert pastel are Dominant or Codominant.
I believe there is a photo of a Pastel Desert Ghost that the Bells produced on amirs webpage(yellowbelly balll python.com ??). the snake is smokin hot!