Make head models use a cleaner texture format

sadly they can't use the original mob textures as those do not follow
a uniform pattern

mods/ITEMS/mcl_heads/init.lua

@@ -53,6 +53,7 @@ mcl_heads.deftemplate_floor = {
 
 mcl_heads.deftemplate_ceiling = table.copy(mcl_heads.deftemplate_floor)
 mcl_heads.deftemplate_ceiling.mesh = "mcl_heads_ceiling.obj"
+mcl_heads.deftemplate_ceiling.groups.not_in_creative_inventory = 1
 mcl_heads.deftemplate_ceiling.selection_box = {
 	type = "fixed",
 	fixed = mcl_heads.CEILING_BOX,
@@ -186,7 +187,7 @@ function mcl_heads.register_head(head_def)
 		_doc_items_longdesc = head_def.longdesc,
 
 		-- The head textures are based off the textures of an actual mob.
-		tiles = { head_def.texture },
+		tiles = { head_def.texture.."^[transformR180" },
 		drop = name,
 
 		_mcl_armor_mob_range_mob = head_def.range_mob,

mods/ITEMS/mcl_heads/models/mcl_heads_ceiling.obj

@@ -2,36 +2,36 @@
 # www.blender.org
 mtllib mcl_heads_ceiling.mtl
 o Cube.002
-v -0.250000 0.012510 0.250000
-v -0.250000 0.512510 0.250000
-v -0.250000 0.512510 -0.250000
-v -0.250000 0.012510 -0.250000
-v 0.250000 0.512510 -0.250000
-v 0.250000 0.012510 -0.250000
-v 0.250000 0.512510 0.250000
-v 0.250000 0.012510 0.250000
-vt 0.875000 0.500000
-vt 0.875000 0.750000
-vt 0.750000 0.750000
-vt 0.750000 0.500000
-vt 0.625000 0.750000
-vt 0.625000 0.500000
-vt 0.500000 0.750000
-vt 0.500000 0.500000
-vt 1.000000 0.500000
-vt 1.000000 0.750000
-vt 0.875000 0.750000
-vt 0.875000 1.000000
-vt 0.750000 1.000000
-vt 0.750000 0.750000
-vt 0.750000 1.000000
-vt 0.625000 1.000000
-vn -1.0000 0.0000 0.0000
-vn 0.0000 0.0000 -1.0000
-vn 1.0000 -0.0000 0.0000
-vn 0.0000 -0.0000 1.0000
-vn -0.0000 -1.0000 -0.0000
-vn 0.0000 1.0000 0.0000
+v 0.251092 0.499452 0.250000
+v 0.249999 -0.000546 0.250000
+v 0.249999 -0.000546 -0.250000
+v 0.251092 0.499452 -0.250000
+v -0.249999 0.000546 -0.250000
+v -0.248906 0.500545 -0.250000
+v -0.249999 0.000546 0.250000
+v -0.248906 0.500545 0.250000
+vt 0.249915 0.996263
+vt 0.249915 0.496094
+vt 0.500000 0.496094
+vt 0.500000 0.996263
+vt 0.750085 0.496094
+vt 0.750085 0.996263
+vt 1.000169 0.496094
+vt 1.000169 0.996263
+vt -0.000169 0.996263
+vt -0.000169 0.496094
+vt 0.249915 0.496094
+vt 0.249915 -0.004075
+vt 0.500000 -0.004075
+vt 0.500000 0.496094
+vt 0.500000 -0.004075
+vt 0.750085 -0.004075
+vn 1.0000 -0.0022 0.0000
+vn -0.0000 -0.0000 -1.0000
+vn -1.0000 0.0022 -0.0000
+vn 0.0000 0.0000 1.0000
+vn 0.0022 1.0000 0.0000
+vn -0.0022 -1.0000 0.0000
 usemtl Material.002
 s 1
 f 1/1/1 2/2/1 3/3/1 4/4/1

mods/ITEMS/mcl_heads/models/mcl_heads_floor.obj

@@ -1,36 +1,36 @@
 # Blender v3.4.1 OBJ File: ''
 # www.blender.org
-mtllib untitled.mtl
+mtllib mcl_heads_floor.mtl
 o Cube.002
 v -0.250000 -0.500000 0.250000
-v -0.250000 0.000000 0.250000
+v -0.250000 -0.000000 0.250000
 v -0.250000 0.000000 -0.250000
 v -0.250000 -0.500000 -0.250000
 v 0.250000 0.000000 -0.250000
 v 0.250000 -0.500000 -0.250000
 v 0.250000 -0.000000 0.250000
 v 0.250000 -0.500000 0.250000
-vt 0.875000 0.500000
-vt 0.875000 0.750000
-vt 0.750000 0.750000
-vt 0.750000 0.500000
-vt 0.625000 0.750000
-vt 0.625000 0.500000
-vt 0.500000 0.750000
-vt 0.500000 0.500000
-vt 1.000000 0.500000
-vt 1.000000 0.750000
-vt 0.875000 0.750000
-vt 0.875000 1.000000
-vt 0.750000 1.000000
-vt 0.750000 0.750000
-vt 0.750000 1.000000
-vt 0.625000 1.000000
-vn -1.0000 0.0000 0.0000
+vt 0.750085 -0.004075
+vt 0.750085 0.496094
+vt 0.500000 0.496094
+vt 0.500000 -0.004075
+vt 0.249915 0.496094
+vt 0.249915 -0.004075
+vt -0.000169 0.496094
+vt -0.000169 -0.004075
+vt 1.000169 -0.004075
+vt 1.000169 0.496094
+vt 0.750085 0.496094
+vt 0.750085 0.996263
+vt 0.500000 0.996263
+vt 0.500000 0.496094
+vt 0.500000 0.996263
+vt 0.249915 0.996263
+vn -1.0000 -0.0000 0.0000
 vn 0.0000 0.0000 -1.0000
 vn 1.0000 -0.0000 0.0000
 vn 0.0000 -0.0000 1.0000
-vn -0.0000 -1.0000 0.0000
+vn 0.0000 -1.0000 0.0000
 vn 0.0000 1.0000 0.0000
 usemtl Material.002
 s 1