PImage bg,alfred;
PGraphics pg2;

  
   void setup()
{
  bg = loadImage("slide1_large.jpg");
  alfred = loadImage("alfred.png");
  size(599,629, P3D);
  background(bg);
}

PGraphics getBuffer(PImage img){
   PGraphics pg1= createGraphics(300,300, P3D);
  
   pg1.beginDraw();
    pg1.background(50,50,10,5);
   pg1.image(img,0,0);
   pg1.endDraw();
   return pg1;
}


void draw(){
pg2=getBuffer(alfred);
image(pg2,0,0);   // Buffered Image
image(alfred,300,0);  // Image blit directly to screen
}