What?

Counter-Strike: Condition Zero contains numerous downscaled Half-Life 2 textures from a version prior to the Leak. These aren't the only ones, but these numbered series of textures have an advantage.

When Half-Life 2's textures were converted, they did so in a useful way. The numbers are their position in the folder that was converted in alphabetical order. This means that not only do we have the textures, we know their relative positions as well. This allows insight into how the texture folders changed, and helps confirm if certain textures are a match.

The numbers indicate how many "places" are between each row of textures. When they are inconsistent, this indicates the texture order has undergone changes. This doesn't work if the texture "series" (metalwall --> metalladder, IE) changes, which is indicated by a "Series break" row.

Info

CZ HL2
cncrt010
concretefloor004a
+4 +4
cncrt014
concretefloor008a
+13 +13
cncrt027
concretefloor016a
+11 +5?
cncrt038
concretefloor023a
+15 +15
cncrt053
concretefloor029a
Series break
cncrt094
concretestair002a
Series break
cncrt102
concretewall001b
cncrt103
concretewall001c
+4 +4
cncrt107
concretewall002b
cncrt108
concretewall002c
+18 +18
cncrt126
concretewall010a
cncrt149
concretewall015a
cncrt150
concretewall015b
cncrt151
concretewall015c
+21 +46?
cncrt172
concretewall020a
also
concretewall027a
+4 +4
cncrt176
concretewall022a? No orig.
+24 +24
cncrt200
concretewall032a
+5 +5
cncrt205
concretewall036a
+5 +5
cncrt210
concretewall037d
+6 +6
cncrt216
concretewall040a
+8 +11?
cncrt224
concretewall042a
+11 +11
cncrt235
concretewall047c
+3 +3 (049a assumed, but missing)
cncrt238
concretewall049b
+11 +10?
cncrt249
concretewall057b
cncrt250
concretewall057c
+15 +19?
cncrt265
concretewall062a
+2 +2 (063a missing
cncrt267
concretewall064a
+8 +8
cncrt275
concretewall065a
cncrt276
concretewall065b
Series break
mtl008
metalceiling008a
+46 +19? (+20 with missing metalceiling009a)
mtl054
metaldoor018a
+36 +53?
mtl114
metaldoor059a
+60 +58?
mtl186
metalhull006c
+2 +2
mtl188
metalhull007b
+21 +21
mtl209
metalladder001a
+44 +13?
mtl253
metalpipe012a
mtl259
metalroof005b
mtl260
? metalroof006a (old)?
Series break (roof textures after this newer?)
mtl261
metalstair001a
+2 +1 (originally metalstair001b?
mtl263
metalstair002a
Series break
mtl286
metalwall004a
+31 +27?
mtl317
metalwall015a
+23 +31?
mtl340
metalwall029a
+32 +27?
mtl372
metalwall047a
+10 +8?
mtl382
metalwall053a
+3 +2?
mtl385
metalwall054b
+4 +3?
mtl389
metalwall054e
+13 +5?
mtl402
metalwall056b
mtl403
metalwall056c
mtl407
mtl413
metalwall061f
+5 +5
mtl418
metalwall064a
+65 +21
mtl483
metalwall085a
plstr123
???
plstr174
plasterwall034d
plstr201
???
plstr222
???
plstr233
plasterwall047b
rock034
rockwall012b
tile017
???
tile023
???
wood093
woodfloor006a
wood136
woodwall009a
wood155
woodwall022a
wood180
???