gibs

I'm trying to make a func_breakable to stop throwing rocks when it gets destroyed, but for some reason when I set material type to none it keeps on doing it. So the only solution I can think of is to make a custom one but I don't know how to add it. I can model it in blender and create the .mdl...

I'm trying to find a way, if possible, to remove the gibs generated when players or props explode from specific areas of a map for optimization purposes. So no messing with tf_playergib. I know all gibs fade away after a few seconds anyway, but I want to remove them as soon as they are spawn or...