a few multi texture models

models/moreblocks_slope.obj

@@ -1,26 +1,56 @@
-# Blender v2.72 (sub 0) OBJ File: ''
-# www.blender.org
-mtllib moreblocks_slope.mtl
-o Cube_Cube.002
+g top
 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 -0.500000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vn 0.0000 0.7071 -0.7071
+s off
+f 2/1/1 1/2/1 4/3/1 3/4/1
+g bottom
 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 -0.500000
-vt 1.000000 1.000000
-vt 0.000000 1.000000
-vt 0.000000 0.000000
-vt 1.000000 0.000000
-vn 0.000000 -0.000000 1.000000
-vn 0.000000 -1.000000 -0.000000
-vn -1.000000 0.000000 0.000000
-vn 1.000000 0.000000 0.000000
-vn 0.000000 0.707100 -0.707100
-usemtl None
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vn 0.0000 -1.0000 -0.0000
 s off
-f 1/1/1 2/2/1 3/3/1 4/4/1
-f 4/3/2 3/4/2 5/1/2 6/2/2
-f 2/1/3 5/3/3 3/4/3
-f 1/2/4 4/3/4 6/4/4
-f 2/1/5 1/2/5 6/3/5 5/4/5
+f 6/5/2 5/6/2 7/7/2 8/8/2
+g right
+v -0.500000 0.500000 0.500000
+v -0.500000 -0.500000 0.500000
+v -0.500000 -0.500000 -0.500000
+vt 1.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vn -1.0000 0.0000 0.0000
+s off
+f 9/9/3 11/10/3 10/11/3
+g left
+v 0.500000 0.500000 0.500000
+v 0.500000 -0.500000 0.500000
+v 0.500000 -0.500000 -0.500000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vn 1.0000 0.0000 0.0000
+s off
+f 12/12/4 13/13/4 14/14/4
+g back
+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 0.500000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vn 0.0000 -0.0000 1.0000
+s off
+f 15/15/5 16/16/5 17/17/5 18/18/5