code: public static void resetMask() {
  		GL.glDepthMask(true);
  		GL.glClearDepth(0);
  		GL.glClear(SGL.GL_DEPTH_BUFFER_BIT);
  		GL.glDepthMask(false);
  		
  		GL.glDisable(SGL.GL_DEPTH_TEST);
  	}
docs: Reset the masked area - should be done after you've finished rendering