When a transformation is applied on a texture with a call to TextureAttributes#setTextureTransform, this transformation is also applied to the graphics drawn with a J3DGraphics2D instance returned by Canvas3D#getGraphics2D, when called in an postRender overridden method.

In the following example, the red rectangle drawn in canvas postRender shouldn't be rotated.

mport java.awt.*;
import java.awt.image.BufferedImage;
import javax.media.j3d.*;
import javax.vecmath.Vector4f;
import com.sun.j3d.utils.geometry.Box;
import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.universe.SimpleUniverse;

public class TextureTransformTest {
  public static void main(String [] args) {
    // Create a box using a rotated texture
    BranchGroup scene = new BranchGroup();    
    Appearance appearance = new Appearance();
    // Create a simple image with a white line
    BufferedImage image = new BufferedImage(4, 4, BufferedImage.TYPE_INT_ARGB);
    Graphics g = image.getGraphics();
    g.setColor(Color.WHITE);
    g.drawLine(0, 0, 4, 0);
    g.dispose();
    appearance.setTexture(new TextureLoader(image).getTexture());
    // Rotate the texture
    TextureAttributes textureAttributes = new TextureAttributes();
    Transform3D rotation = new Transform3D();
    rotation.rotZ(Math.PI / 4);
    textureAttributes.setTextureTransform(rotation);
    appearance.setTextureAttributes(textureAttributes);
    appearance.setTexCoordGeneration(new TexCoordGeneration(
        TexCoordGeneration.OBJECT_LINEAR, TexCoordGeneration.TEXTURE_COORDINATE_2, 
        new Vector4f(10, 0, 0, 10), new Vector4f(0, 10, -10, 10)));
    Box box = new Box(0.5f, 0.5f, 0.5f, appearance);
    scene.addChild(box);
    
    // Create a canvas 3D that post renders a red rectangle  
    GraphicsConfiguration configuration = GraphicsEnvironment
        .getLocalGraphicsEnvironment().getDefaultScreenDevice()
        .getBestConfiguration(new GraphicsConfigTemplate3D());
    Canvas3D canvas = new Canvas3D(configuration) {
        @Override
        public void postRender() {
          // Bug: The red rectangle is correct under Java 3D 1.3
          // but is rotated under Java 3D 1.5.2 and 1.6
          J3DGraphics2D g2D = getGraphics2D();
          g2D.setColor(Color.RED);
          g2D.drawRect(10, 10, getWidth() - 20, getHeight() - 20);
          g2D.flush(true);
        }
      };
    SimpleUniverse universe = new SimpleUniverse(canvas);
    universe.getViewingPlatform ().setNominalViewingTransform ();
    universe.addBranchGraph(scene);

    // Build a GUI that displays canvas 
    Frame frame = new Frame("TextureTransformTest");
    frame.add(canvas, BorderLayout.CENTER);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}