This is a tutorial.

How to make realistic breakable objects in Phun

Start by making your object in one piece:

Then you have to chose what material you are going to make it out of in your head: Do you want it to be concrete, wood, stone, metal plastic, ect.?

For wood you want pieces with long jagged edges like this:

For concrete you want less jagged edges and maybe reinforcing metal rods (how to add rods in extras):

For plastic you should have edges sort of between wood and metal, not too jagged but also not too flat:

Make the pieces with the polygon tool holding down shift and releasing then holding down again for straight lines:

When finished connect all the pieces with small completely transparent rectangles with a hinge on both short ends and no collisions:

Make the break limit on all the hinges what ever you like but I recommend to stay within a reasonable range:

Extra

Metal reinforcement: to add metal reinforcement make a chain of rods. Then attach them in a way making it bend stiffly use breakable hinges with a little over the amount your object's hinges break limit is.

Examples

Wood: http://www.phunbox.net/details/1797/

Plastic: http://www.phunbox.net/details/2258/

Concrete (with metal reinforcement): http://www.phunbox.net/details/2123/