If you're using the code from your previous post, you can put any values in sunflow.setWidth(width) and sunflow.setHeight(height). 

I work with another script but, yeah this lines works perfectly:) Thank you.

But now I have another issue to ask.

I know amnon5 said that there is possibility to render faster somehow.
Is it possible to change my main script tab to render images faster.

The script is below:

1. import toxi.physics.behaviors.*;
   import toxi.physics.*;
   import toxi.geom.*;
   import toxi.math.*;
   import java.awt.Frame;
   import java.awt.BorderLayout;
   //import controlP5.*;
   import peasy.*;
   import sunflowapiapi.P5SunflowAPIAPI;
   
   VerletPhysics physics;
   Cluster cluster;
   //private ControlP5 cp5;
   //ControlFrame cf;
   PeasyCam cam;
   
   int def;
   int abc;
   
   P5SunflowAPIAPI sunflow ;
   int sceneWidth = 600;
   int sceneHeight = 600;
   
   
   void setup() {
     size(sceneWidth, sceneHeight, "sunflowapiapi.P5SunflowAPIAPI");
   
     smooth();
     //INITIALIZE CAMERA
    cam = new PeasyCam(this, 300, 300, -60, 400);
     //INITIALIZE CONTROLP5
    // cp5 = new ControlP5(this);
   //  cf = addControlFrame("extra", 200, 200);
     //INITIALIZE PHYSICS
     physics=new VerletPhysics();
     physics.setDrag(0.05);
     physics.setWorldBounds(new AABB(new Vec3D(300, 300, 600), new Vec3D(300, 300, 600)));
     //INITIALIZE CLUSTER
     cluster = new Cluster(10, 0.01, 30);
       sunflow = (P5SunflowAPIAPI) g;
   }
   
   void draw() {
     translate(300,300);
     rotateX(-.5);
     rotateY(-.5);
     //UPDATE PHYSICS
     background(255);
     physics.update();
     cluster.display();
     cluster.showConnections();
     translate(300, 300, 300);
     if (frameCount%2==0) {
        sunflow.setPathTracingGIEngine(32);
      sunflow.setWidth(1200); sunflow.setHeight(1200);
    sunflow.render(false, sketchPath + "/"+frameCount+".png");
   
      
     }
    
   }