Improved stairs model

mods/stairs/models/stairs.obj

 # Blender v2.72 (sub 0) OBJ File: ''
 # www.blender.org
-o stair
-v -0.500000 -0.500000 0.500000
-v -0.500000 -0.000000 0.500000
 v -0.500000 0.000000 -0.500000
 v -0.500000 -0.500000 -0.500000
-v 0.500000 -0.500000 0.500000
+v -0.500000 0.000000 0.000000
+v 0.500000 0.000000 0.000000
 v 0.500000 -0.500000 -0.500000
 v 0.500000 0.000000 -0.500000
-v 0.500000 -0.000000 0.500000
-v -0.500000 -0.000000 0.500000
-v -0.500000 0.500000 0.500000
+v -0.500000 -0.500000 0.500000
+v 0.500000 -0.500000 0.500000
 v -0.500000 0.500000 0.000000
-v -0.500000 0.000000 0.000000
-v 0.500000 -0.000000 0.500000
-v 0.500000 0.000000 0.000000
 v 0.500000 0.500000 0.000000
+v -0.500000 0.500000 0.500000
 v 0.500000 0.500000 0.500000
-vt 1.000000 0.000000
-vt 1.000000 0.500000
 vt 0.000000 0.500000
 vt 0.000000 0.000000
+vt 0.500000 0.500000
+vt 1.000000 0.000000
+vt 1.000000 0.500000
 vt 1.000000 1.000000
 vt 0.000000 1.000000
 vt 0.500000 1.000000
-vt 0.500000 0.500000
+vt 0.999900 0.000100
+vt 0.999900 0.999900
+vt 0.000100 0.999900
+vt 0.000100 0.000100
+vn -1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 0.000000 0.000000 -1.000000
+vn 0.000000 -1.000000 -0.000000
+vn 0.000000 1.000000 0.000000
+vn 0.000000 -0.000000 1.000000
 s off
-f 1/1 2/2 3/3 4/4
-f 5/4 6/1 7/2 8/3
-f 1/4 5/1 8/2 2/3
-f 4/1 3/2 7/3 6/4
-f 1/1 4/5 6/6 5/4
-f 2/5 8/6 7/4 3/1
-f 9/2 10/5 11/7 12/8
-f 13/3 14/8 15/7 16/6
-f 9/3 13/2 16/5 10/6
-f 12/2 11/5 15/6 14/3
-f 10/5 16/6 15/3 11/2
+f 1/1/1 2/2/1 3/3/1
+f 4/3/2 5/4/2 6/5/2
+f 2/4/3 1/5/3 6/1/3 5/2/3
+f 7/4/4 2/6/4 5/7/4 8/2/4
+f 6/2/5 1/4/5 3/5/5 4/1/5
+f 3/5/3 9/6/3 10/7/3 4/1/3
+f 11/6/5 12/7/5 10/1/5 9/5/5
+f 4/3/2 10/8/2 12/7/2
+f 8/9/6 12/10/6 11/11/6 7/12/6
+f 3/3/1 11/6/1 9/8/1
+f 2/2/1 7/4/1 11/6/1
+f 5/4/2 12/7/2 8/2/2