Star Layer
Contents
About Star Layers
A "Star Layer" is a geometric object that is made by the filling the region resulting from connecting the points of two concentric circles with straight lines. The number of points on which the circles are divided defines the number of peaks of the star. The points over the circles are spread regularly over both circles but one of them has the points rotated N/360/2 degrees from the other circle (being N the number of peaks or points).
Parameters of Star Layers
The parameters of the star layers are:
Name  Value  Type 
Z Depth  0.000000  real 
Amount  1.000000  real 
Blend Method  Composite  integer 
Color 

color 
Origin  0.500000u,0.000000u  vector 
Invert 

bool 
Antialiasing 

bool 
Feather  0.500000u  real 
Type of Feather  Fast Gaussian Blur  integer 
Winding Style  Non Zero  integer 
Outer Radius  1.500000u  real 
Inner Radius  0.500000u  real 
Angle  0.00  angle 
Points  5  integer 
Regular Polygon 

bool 
The parameters of the star layers are the same as the majority of the shapelike objects but it has specific parameters for its own properties.
Outer Radius
Defines the radius of the circle where the peaks of the star lay.
Inner Radius
Defines the radius of the circle where the valleys of the star lay.
Angle
Is the rotation angle for the first peak of the star. Its default value is 90 degrees.
Points
Defines the number of divisions done in the circles and therefore the number of points and peaks in the star.
Playing Around
Crazy Radii
The "Outer Radius" shouldn't be greater than "Inner Radius". It only changes the star's orientation:
Inner Radius = 40; Outer Radius = 60  Inner Radius = 60; Outer Radius = 40 
You can also play with negative values:
Inner Radius = 40; Outer Radius = 60  Inner Radius = 40; Outer Radius = 60 
Winding Style Hacks
You can even play with the Winding Style Parameter and negative values to obtain some effects:
Inner Radius = 40; Outer Radius = 60; WS=even/odd  Inner Radius = 40; Outer Radius = 60; WS=even/odd 
Regular 2Nsided Polygons
Also you can link both radii to create a 2*N sided regular polygon, where N is the number of points (3 points for this case (six sides)):