I have the following script:

void setup(){
  size(800,400,P3D);
  colorMode(HSB, 360, 100, 100);
  background(360);
  smooth(8);
}

void draw(){
  strokeWeight(1);
  stroke(50);
  rect(100,100,100,100);
}

but I go the following result:



only when i set "smooth()" will the script work...

Any advise?
(using Processing 2.05b in Mac OS X)

thanks in advance!

- J