qt: how to avoid double glassy textures shining?

[Frank Brübach]

dear rs friends:-) how can I avoid the double through shining (don't know the 
right word in english, sorry) of glassy textures? I mean my both cylinder 
objects right side in my scene... I have attached it... best regards, frank
_______________________________________________________________
Schon gehört? Der neue WEB.DE MultiMessenger kann`s mit allen: 
http://www.produkte.web.de/messenger/?did=3016