how to ELIMINATE P3D text rotation flicker on a PGraphics Buffer

In the code below, where I use the deadpixel library, my text is flickering, and I can't quite figure out why / how to stop it...

import deadpixel.keystone.*;
String[] texts =
  {
  "#peace, this is what I've wanted from SF --",
  "market street is always so colorful, the",
  "Opened Graffiti request via android at 990 Market St",
  "the Opened Street or Sidewalk Cleaning request",
  "via android at 1000 Market St",
  "#sfc, join our lonely little squad tonight,",
  "the operation nerds gathering, the new False Gods,",
  "in for some #bigdatatalk, and to answer your email",
  "#streetstyle #streetphotography #sf #walk #voyager:",
  "I met this beautiful soul at the #BlueLamp a few months back --",
  "just posted a photo,",
  "so impressed,",
  "I'm suffering through the widthdrawl..."};
String[] mentions =
  {
  "@melematique + @mistry_chintan",
  "@JoCrra",
  "@SF311 Reports",
  "@SF311 Reports",
  "@SF311 Reports",
  "@totallyclubbin",
  "@calitalieh + @catsynth",
  "@agentv",
  "@JoCrra",
  "@Delany_Rene",
  "@Delany_Rene",
  "@WillKirkpatrick",
  "@hchiu13",
};
DisplayBox dp1; //single
DisplayBox[] dps; //multiple
PFont font;
PFont fontS;
Keystone ks;
CornerPinSurface surface;
PGraphics offscreen;
float[] widthVariable;
float angle = 0;
float textFade = 0;
float tf = 0;
int counter = 0;
float rCounter = 0;
float tCounter = 0;
int switchVariable = 0;
void setup() {
  font = loadFont("c.vlw");
  fontS = loadFont("b.vlw");
  //fullScreen(P3D, 1);
  size(1325, 750, P3D);
  ks = new Keystone(this);
  surface = ks.createCornerPinSurface(1325, 750, 20);
  offscreen = createGraphics(1325, 750, P3D);
  //dp1 = new DisplayBox(0, texts[0], 0, height/2, 0);
  dps = new DisplayBox[texts.length];
  for (int i=0; i<texts.length; i++) {
    dps[i] = new DisplayBox(i, texts[i], 10, 100+(i*50), 0);
  }
  widthVariable = new float[texts.length];
}
void draw() {
  rCounter+=.05;
  tCounter+=5;
  //setting text widths;
  for (int i=0; i<texts.length; i++) {
    widthVariable[i]=offscreen.textWidth(texts[i])+20;
  }
  PVector surfaceMouse = surface.getTransformedMouse();
  offscreen.beginDraw();
  offscreen.background(0);
  offscreen.textFont(font, 42);
  offscreen.fill(255);

  //(*.) try to figure out the flickering
  //stroke, rect, text, rotate, translate;
  //remember the transparency effects;
  for (int i=0; i<texts.length; i++) {
    dps[i].DRT(255, 5, 0, 255, 255, 255, 0, rCounter, 0, 0, 0, 0);
  }

  offscreen.endDraw();
  background(0);
  surface.render(offscreen);
  //for text-fading;
  textFade = sin(angle);
  angle += 0.25;
  tf = map(textFade, -1, 1, 255/2, 255);
}

void keyPressed() {
  switch(key) {
  case 'c':
    // enter/leave calibration mode, where surfaces can be warped
    // and moved
    ks.toggleCalibration();
    break;

  case 'l':
    // loads the saved layout
    ks.load();
    break;

  case 's':
    // saves the layout
    ks.save();
    break;
  }
}

class DisplayBox {
  //STRING DATA;
  int sentenceW; //sentenceWidth;
  String sentence; //the string;
  //POSITION DATA;
  float xPos; //x pos
  float yPos; //y pos
  float zPos; //z pos
  //COLORS;
  float sW; //stroke weight;
  float rSC; //stroke color;
  float rST; //stroke transparency;
  float rFC; //fill color;
  float rFT; //fill transparency;
  float tF; //text fill;
  float tT; //text transparency;
  //TRANSLATIONS;
  float transX; //move x
  float transY; //move y
  float transZ; //move z
  //ROTATION DATA;
  float ogX; //origin x
  float ogY; //origin y
  float ogZ; //origin z
  DisplayBox(int sWI, String s, float xP, float yP, float zP) {
    sentenceW = sWI;
    sentence = s;
    xPos = xP;
    yPos = yP;
    zPos = zP;
  }
  //colors, rotations, translations
  void DRT(float rSC, float sW, float rFC, float rFT,
  float tF, float tT, float rX, float rY,
  float rZ, float transX, float transY, float transZ) {
    ogX = xPos + widthVariable[sentenceW]/2;
    ogY = yPos - 15;
    ogZ = zPos;
    offscreen.pushMatrix();
    offscreen.translate(transX, transY, transZ);
    offscreen.translate(ogX, ogY, ogZ);
    offscreen.rotateX(rX);
    offscreen.rotateY(rY);
    offscreen.rotateZ(rZ);
    offscreen.translate(-ogX, -ogY, -ogZ);
    offscreen.stroke(rSC);
    offscreen.strokeWeight(sW);
    offscreen.fill(rFC, rFT);
    offscreen.rect(xPos, yPos-42, widthVariable[sentenceW], 50);
    offscreen.fill(tF, tT);
    offscreen.text(sentence, xPos+5, yPos, zPos);
    offscreen.popMatrix();
  }
}