private void initGL() {

      /* OpenGL */
      int width = Display.getDisplayMode().getWidth();
      int height = Display.getDisplayMode().getHeight();

      GL11.glViewport(0, 0, width, height); // Reset The Current Viewport
      GL11.glMatrixMode(GL11.GL_PROJECTION); // Select The Projection Matrix
      GL11.glLoadIdentity(); // Reset The Projection Matrix
      GLU.gluPerspective(45.0f, ((float) width / (float) height), 0.1f, 1000.0f); // Calculate The Aspect Ratio Of The Window
      GL11.glMatrixMode(GL11.GL_MODELVIEW); // Select The Modelview Matrix
      GL11.glLoadIdentity(); // Reset The Modelview Matrix

      GL11.glShadeModel(GL11.GL_SMOOTH); // Enables Smooth Shading
      GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Black Background
      GL11.glClearDepth(1.0f); // Depth Buffer Setup
      GL11.glEnable(GL11.GL_DEPTH_TEST); // Enables Depth Testing
      GL11.glDepthFunc(GL11.GL_LEQUAL); // The Type Of Depth Test To Do
      GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST); // Really Nice Perspective Calculations
      GL11.glEnable(GL11.GL_TEXTURE_2D);
      GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
      }

GL11.glEnable(GL11.GL_ALPHA_TEST);
GL11.glAlphaFunc(GL11.GL_GREATER, 0.9f);