Provide me with a list of addons you have installed. There may be something that is preventing gmDoom from generating the textures.

I don't think I can do that. I have a ton to list.
*Edit: http://imgur.com/a/aUr4g#0 <- That's my addons

I've just added the concommands "gmDoom_info" and "gmDoom_spewaddons". Run both commands and post the results of each.

] gmDoom_info
]
=================
== gmDoom Info ==
=================
[
WAD file: "doom2.wad"
Allocated texRects: 157
Loaded texRects: 157
Allocated flats: 31
Loaded flats: 31

DXLevel: 81
OS: "Windows"

MaxPlayers: 1
]


] gmDoom_spewaddons
]
============
== Addons ==
============


Mounted Addons:

[ 104625632 ] Extreme Football Throwdown
[ 104477078 ] dm_ponyville_b3
[ 104637365 ] Skyrim Dragon Shouts
[ 105347846 ] Custom Crosshair Loader
[ 105206855 ] Playerlist - Clienside Mute
[ 107155115 ] Pony Playermodel and NPC
[ 104694154 ] Mane 6 Ponies
[ 106904944 ] My Little Other Ponies
[ 105225353 ] Slappers
[ 107246519 ] Call Of Duty-Nacht Der Untoten
[ 105032438 ] Insomnia
[ 107016156 ] Weapon storage
[ 105284712 ] Crisps swep!
[ 105462463 ] Zombie Survival
[ 105836728 ] Cliffhouse physics map
[ 104607519 ] Minecraft Torch
[ 105841291 ] More Materials!
[ 106944414 ] RT Camera
[ 105105337 ] Corpse B Gone
[ 108922813 ] Realistic Blood
[ 106672536 ] the Blowback
[ 110871780 ] Hit Numbers
[ 110183835 ] Swep Misriah Armory M6G
[ 111955108 ] Throwable Stunstick
[ 104605598 ] Emplacement Gun
[ 104858249 ] Skypaint
[ 117963440 ] PillGun
[ 110418480 ] Minecraft NPC - Steve
[ 115108746 ] Elegy of Emptiness (MM)
[ 118394526 ] Flashlight SWEP
[ 116690393 ] Gas Can
[ 122413779 ] More Emitters
[ 122969743 ] Resistance Turrets
[ 124690083 ] Full Metal Alchemist Models
[ 129470195 ] Mad Cows Weapons
[ 104502728 ] Firearms Source Weapons For Gmod 13
[ 110548369 ] ttt_culdesac_b2
[ 113495466 ] Climb SWEP 2
[ 132835998 ] All WWII DOD Weapons For Gmod 13
[ 104700241 ] Insurgency Weapons Expansion Pack
[ 104495009 ] Insurgency Weapons For Gmod 13
[ 104479034 ] CSS Realistic Weapons
[ 104479467 ] Door STool
[ 104480013 ] Weight STool
[ 104479831 ] Stacker STool
[ 104634865 ] No Collide World [Reupload]
[ 104648051 ] Half-Life 2 Driveable Vehicles
[ 104651870 ] CS:Source Driveable Vehicles
[ 104482086 ] Precision Tool
[ 105115318 ] Fading Door STool
[ 106097470 ] Turbo Propertys
[ 106516163 ] PlayX 2.7.5
[ 108720350 ] CSS Weapons on M9K Base
[ 128089118 ] M9K Assault Rifles
[ 128091208 ] M9K Heavy Weapons
[ 105543612 ] Turbo Constraint Multi
[ 105862893 ] Player Weld Tool
[ 110957077 ] NCR Ranger Riot Armor REUpload
[ 128093075 ] M9K Small Arms pack
[ 132976211 ] [PROTOTYPE]
[ 107890862 ] Samus
[ 140334591 ] Crystal Clear Weapons
[ 131395879 ] Ignition Pulse Rifle
[ 104626275 ] Miranda Lawson
[ 144566644 ] Minecraft Hostile Mobs
[ 104548572 ] Playable Piano
[ 145793553 ] gm_7eleven_night
[ 107208395 ] Destructable House
[ 133300986 ] gmDoom
[ 146475190 ] Flight SWEP
[ 145276433 ] Pac-Man Arcade Machine
[ 145310679 ] gmDoom Maps
[ 145297966 ] Qbert Arcade Machine
[ 145475445 ] Donkey Kong Arcade Machine
[ 145782303 ] Dig Dug Arcade Machine
[ 144790780 ] RP_Construct_v1
[ 104483020 ] SCars Slim
[ 135961700 ] ModelsConversionTool
[ 145785187 ] Black Knight Pinball Machine
[ 146450527 ] Dig Dug Pixel Art
[ 104486597 ] NPC Tools
[ 116892991 ] Resizer
[ 145316417 ] ttt_fastfood_a6
[ 109810455 ] gTerminal
[ 104487316 ] SCars Basic
[ 104492363 ] SCars Extra
[ 106926982 ] Bike for SCars 2.0
[ 105144348 ] SligWolf`s Motorbike
[ 145839229 ] Best of Toybox
[ 147311500 ] House With Garden 2
[ 147256391 ] Escape the Apartment Ep.1
[ 145772871 ] ttt_moondeagle_3rd_nd

Legacy Addons:

Adv%20Duplicator
AdvDuplicator-master
GMT2_BallRace
GMT2_Base
GMT2_Lobby
GMT2_PVP
GMT2_UCH
GMT2_Virus
GMT2_ZombieMassacre
addons
toybox
wire
wire-master