Split Planes - AD18.1.7 Gotcha

If  you build a Split Plane with a No Net area on the plane that area will be flooded with copper assigned to GND.

3D View

2D View - Before Rebuilding Split Planes

2D View - After Rebuilding Split Planes

Tools > Split Planes > Rebuild . . . 

Gerbers viewed in Camtasic (Negative Image)

(Negative Image) Black = Copper, Gray = No Copper


Tips: 

Don't count on unused No Net areas to remain free of copper, they will default to GND.

Use Fills or Solid Regions assigned to No Net to remove copper.


That's it !