better second floor texture

assets/map/upper_floor.mtl

@@ -1,12 +1,13 @@
 # Blender MTL File: 'None'
 # Material Count: 1
 
-newmtl upper_floor.png
-Ns 323.999994
+newmtl floor
+Ns 225.000000
 Ka 1.000000 1.000000 1.000000
 Kd 0.800000 0.800000 0.800000
 Ks 0.500000 0.500000 0.500000
 Ke 0.000000 0.000000 0.000000
-Ni 1.000000
+Ni 1.450000
 d 1.000000
 illum 2
+map_Kd upper_floor.png

assets/map/upper_floor.obj

@@ -1,57 +1,54 @@
 # Blender v2.92.0 OBJ File: ''
 # www.blender.org
 mtllib upper_floor.mtl
-o floor.001_floor.002
-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
-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 0.414214 0.414214
-vt 0.000000 0.414214
-vt 0.414214 0.000000
-vt 0.000000 0.000000
-vt 0.000000 0.000000
-vt 1.000000 0.000000
-vt 0.000000 1.000000
-vt 1.000000 1.000000
-vt 0.000000 0.000000
-vt 1.000000 0.000000
-vt 0.000000 1.000000
-vt 0.707107 0.414214
-vt 0.707107 1.000000
-vt 0.414214 0.707107
-vt 0.000000 0.000000
-vt 0.000000 1.000000
-vt 1.000000 1.000000
-vt 0.828427 0.000000
-vt 0.828427 0.414214
-vt 0.414214 0.000000
-vt 0.414214 0.414214
-vt 0.414214 0.828427
-vt 0.134181 0.701308
-vt 0.548395 0.287095
-vt 0.134181 0.287095
-vn 0.0000 -0.0000 1.0000
-vn 0.0000 0.0000 -1.0000
-vn 0.0000 -1.0000 -0.0000
-vn 1.0000 0.0000 0.0000
-vn -1.0000 0.0000 0.0000
-vn 0.0000 1.0000 0.0000
-usemtl floor.002
-s off
+o floor
+v -0.500000 -0.499144 0.500854
+v -0.500000 -0.500854 -0.499144
+v 0.500000 -0.499144 0.500855
+v 0.500000 -0.500855 -0.499144
+v 0.500000 0.500854 0.499144
+v 0.500000 0.499144 -0.500854
+v -0.500000 0.500855 0.499144
+v -0.500000 0.499144 -0.500855
+vt 0.000977 0.667790
+vt 0.000977 0.333151
+vt 0.333659 0.667790
+vt 0.333659 0.333151
+vt 0.666341 0.667790
+vt 0.666341 0.333151
+vt 0.333659 0.667790
+vt 0.333659 1.002429
+vt 0.000977 0.667790
+vt 0.000977 1.002429
+vt 0.666341 0.667790
+vt 0.666341 1.002429
+vt 0.333659 0.667790
+vt 0.333659 1.002429
+vt 0.666341 0.333151
+vt 0.999024 0.333151
+vt 0.666341 0.667790
+vt 0.999024 0.667790
+vt 0.999024 1.002429
+vt 0.666341 1.002429
+vt 0.999024 0.667790
+vt 0.666341 0.667790
+vn -0.0000 -1.0000 0.0017
+vn 1.0000 -0.0000 0.0000
+vn 0.0000 1.0000 -0.0017
+vn -1.0000 0.0000 -0.0000
+vn 0.0000 -0.0017 -1.0000
+vn -0.0000 0.0017 1.0000
+usemtl floor
+s 1
 f 1/1/1 2/2/1 3/3/1
 f 3/3/1 2/2/1 4/4/1
-f 5/5/2 6/6/2 7/7/2
-f 7/7/2 6/6/2 8/8/2
-f 7/9/3 8/10/3 1/11/3
-f 1/12/3 8/13/3 2/14/3
-f 2/15/4 8/10/4 4/16/4
-f 4/16/4 8/10/4 6/17/4
-f 7/18/5 1/19/5 5/20/5
-f 5/20/5 1/19/5 3/21/5
-f 3/22/6 4/23/6 5/24/6
-f 5/24/6 4/23/6 6/25/6
+f 3/3/2 4/4/2 5/5/2
+f 5/5/2 4/4/2 6/6/2
+f 5/7/3 6/8/3 7/9/3
+f 7/9/3 6/8/3 8/10/3
+f 7/11/4 8/12/4 1/13/4
+f 1/13/4 8/12/4 2/14/4
+f 2/15/5 8/16/5 4/17/5
+f 4/17/5 8/16/5 6/18/5
+f 7/19/6 1/20/6 5/21/6
+f 5/21/6 1/20/6 3/22/6