BND

BND is a simple ASCII format file used to define the collision box of a PKG object. An example of a BND file would be this:

vp4x4_BOUND.bnd

version: 1.01     //Always seems to be 1.01?
verts: 12     //Vertex count
materials: 1     //How many material definitions the BOUND has
edges: 0     //Edge count
polys: 13     //Poly count

v	-1.237810	0.624240	2.996410 
v	-1.237810	1.771920	2.827500 
v	-1.237810	2.202820	-0.881580 
v	-1.237810	1.310590	-2.904570 
v	-1.237810	0.420690	-2.904570 
v	1.243870	0.624240	2.996410 
v	1.243870	0.420690	-2.904570 
v	1.243870	1.310590	-2.904570 
v	1.243870	2.202820	-0.881580 
v	1.243870	1.792910	2.827500 
v	-1.237810	2.192200	1.307540 
v	1.243870	2.192200	1.307540 

mtl default {
	elasticity: 0.100000 
	friction: 0.500000 
	effect: none
	sound: 0
}

quad 0  1  2  3  0 
tri 3  4  0  0 
quad 5  6  7  8  0 
quad 11  9  5  8  0 
quad 0  4  6  5  0 
quad 4  3  7  6  0 
quad 2  10  11  8  0 
tri 1  0  5  0 
tri 5  9  1  0 
quad 8  7  3  2  0 
tri 9  11  10  0 
tri 10  1  9  0 
tri 1  10  2  0 

BND's can have their own materials (grass, cobblestone, etc.) depending on what the purpose of the BND is (car's collision box, drivable surfaces, etc.)