[Knower998]

I don't think Intergalactic uses Source textures either. I'll try to find more maps that don't and edit them into the list below as I go.

TTT_Sands https://steamcommunity.com/sharedfiles/f...=sands+TTT
TTT_SBaHJ* https://steamcommunity.com/sharedfiles/f...=sbahj+ttt
TTT_Mouse_House* https://steamcommunity.com/sharedfiles/f...m+textures
TTT_Cruise https://steamcommunity.com/sharedfiles/f...m+textures
TTT_Doom https://steamcommunity.com/sharedfiles/f...m+textures
TTT_lostwoods https://steamcommunity.com/sharedfiles/f...+lostwoods
Hazy Maze Cave http://steamcommunity.com/sharedfiles/fi...htext=cave
TTT_PCWorld95* https://steamcommunity.com/sharedfiles/f...m+textures or https://steamcommunity.com/sharedfiles/f...xt=PCWorld (smaller version)
TTT_Outset_Island* https://steamcommunity.com/sharedfiles/f...m+textures
Kakariko Village https://steamcommunity.com/sharedfiles/f...T+kakariko
Undertale - MTT_Resort* https://steamcommunity.com/sharedfiles/f...m+textures
TTT_Intergalactic* https://steamcommunity.com/sharedfiles/f...m+textures

*These don't explicitly state they don't need CSS textures, but they say they use Custom Textures and don't have any CSS textures in the preview pictures


Welp, think that's everything I could find.