Hi, 
the Express VI "Sensor mapping" puts a 3D text object into the scene: 
the text position follows the mouse position, like a pointer. 
The text is never hidden by the solid, irrespective of the its orientation 
(see attached picture). 
This is not trivial: using the "pick point" method I tried to do the same thing in one of my Vis: 
a (actually) slighlty shifted text is inserted into the scene: when the mouse moves 
the text changes its position. However, and this is expected, when the orientation 
of the solid is changed the text is hidden: see the other figure. 
How to obtain the "sensor mapping" effect (without using transparency)? 
Thanks in advance 
Giovanni