I'm trying to draw a 2d hud over a 3d scene.

1. void draw(){
2.   background (SKYCOLOR);
3.   directionalLight(255, 255, 255, -1, -2, -1);
4. 
   
5.   //draw 3d stuff
6.   player.draw();
7.   drawland();
8.   fill(255,0,0); 
   
9. 
   
10.  //switch to 2d
11.   camera(); 
12.   println(p3d.zbuffer.length); 
    
13.   for(int i=0; i<p3d.zbuffer.length; i++)  {
14.    p3d.zbuffer[i] = Float.MAX_VALUE;
15.   } 
16. 
    
17.   //draw 2d stuff
18.   rect(width/2-15,height/2-15,30,30);
19.  
    
20.   //back to 3d
21.   camera(pos.x,pos.y,pos.z, pos.x+face.x, pos.y+face.y, pos.z+face.z, 0,0,-1);
22.  
      repeatkeys();
23. }

If I don't swap to 3d at the end of draw(), the light doesn't light the 3d objects in the scene. But if i do swap, it lights the 2d hud stuff as well, so that if i'm facing away from the light, the 2d hud is black. How can I exclude certain objects from being hit by lights?

I'm trying to load some colors from a text file. It seems like I'm loading the color data successfully, but I can only get them to work for background() - not for fill(). This is the code I'm using:

1. int TILE = 8;
2. int WIDTH_T  = 80; int HEIGHT_T = 40;
3. color[] palette;
4. 
   void setup(){
5.   frameRate(8);
6.   setpalette();
7.   size(palette.length*TILE,TILE*5);
8. }
9. 
   void draw() {
10.   background( palette[frameCount % palette.length] );
11.   drawpalette();
12. }
    
    void setpalette() {
13.   String[] strings = loadStrings("pal.txt");
14.   palette = new color[strings.length];
15.   for (int p = 0; p<strings.length; p++) {
16.     palette[p] = color(unhex(strings[p]));
17.   }
18. }
    
    void drawpalette(){
19.   for (int p = 0; p<palette.length; p++) {
20.     fill(palette[p]);
21.     rect(p*TILE, 2*TILE, TILE, TILE);
22.     //background( palette[frameCount % palette.length] );
23.   }
24. }

the text file "col.txt" has this data:

1. FFFFFF
2. 888888
3. 000000
4. FF0000
5. 880000
6. 00FF00
7. 008800
8. 0000FF
9. 000088

How is it possible that the colors loaded would work with the background() function, but not fill()?