respawing glass is easy, tie the glass to a funtion breakable give it a name, then create a point_template set its name up and in the first template set the name to your glass, create a logic_auto. On the outputs put (onmapspawn, "your point_template", forcespawn) Now under your glass put in the outputs (onbreak, "your point_template", forcespawn) and put a delay of how ever many seconds you want to delay the spawning that should work. If im wrong look at this web site: http://www.hl2world.com/wiki/index.php/Exploding_Barrels_%28UPDATED%29

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I did the steps and got the glass to respawn but there was a problem, the bullet holes and explosion marks were on the glass that respawned. It wasnt a clean slate of new glass. So i was just wondering how i could respawn new glass, instead of one with bullet marks...etc.