M-2000C Texture Keywords

[Nasaman]

I was trying to edit the M2KC_10T file and bring my changes into the game.

Now the other files M2KC_1T/2T/6T... have the keywords ext1, ext2, ext6... in the description .lua

 

I tried using ext10 and some variants of it as a keyword but it didn't work.

 

Does anyone know what the keyword for all the texture files or at least for the M2KC_10T is?