For your info:
You need CurveLoop and GetCropRegionShapeManager.
Example:
eastShape = YourEastElevation.GetCropRegionShapeManager();
eastShape.SetCropShape(YourCurveLoop);
For your info:
You need CurveLoop and GetCropRegionShapeManager.
Example:
eastShape = YourEastElevation.GetCropRegionShapeManager();
eastShape.SetCropShape(YourCurveLoop);