When I run this code, all I get is a white background, no shapes. Could someone point out what I am missing here. Obviously the buf.background(color val) is working, but no love for the shapes.

I've tried playing with null/this in the PGraphics constructor and the loadPixels/updatePixels although I believe that's only necessary for OpenGL.

Code:

PGraphics buf;
void setup(){
  size(400,400,P3D);
  // buf= new PGraphics(400, 400, null); // no diff
  buf= new PGraphics(400, 400, this); // no diff

  // buf.loadPixels(); // no effect
  // loadPixels(); // no effect

  buf.colorMode(RGB,255);
  buf.background(255);
  buf.fill(0,222,0);
  buf.stroke(100,100,0);
  buf.rect(10,20,100,100);
  buf.ellipse(40,80,120,130);

  // buf.updatePixels(); // no effect
  // updatePixels(); // no effect

  image(buf,0,0,width,height);

}

void draw(){
  image(buf,0,0,width,height);
} 

RTFF indeed. my mistake.