select in 3D

[Daniele C. <dca...@in...>]

When an object is select in 3D I use some little square make with 
TQ3PixmapMarkerData for the handle of object.

Can you see the result at http://www.interstudio.net/quesa/select.jpg

The result is not very good because the handle partially hide back some face.

Can you see the result at http://www.interstudio.net/quesa/select2.jpg

What I can use for highlight a selection?
I will appreciate any help
Daniele