It seams Processing does what it wants with me, then i try drawing something like this in P3D or OPENGL

1. 
   
2. PImage a=loadImage("picture.jpg");
   
3. 
   
4. beginShape();
5. 
   texture(a);
   vertex(0, 0, 0, 0);     
   vertex(100,0 , 1, 0);  
   vertex(100, 100, 1,1 );
   vertex(0,100 , 0, 1); 
6. 
   endShape();

it works fine if i call it from the setup()  but not if i dare to put the same code in one of my classes.
Then Processing will just render nothing so i tested if the code is executed and it is.
So why the fuck did this all work then i still used 2D.
I only changed because i didnt want to rezize my pictures all the time but now its only gray.
I have this thought that my processing is broken.

Maybe some of you have encountered similar problems and can tell me what to do



ps: dont say i should not use classes, project got to big to change that now.