[socorrista22198]

I haven´t understood you very well but this is I know about .mat´s.

1 The .eff calls .mat.
2 the .mat called, calls .tga.

You can create new .mat as you like with also new .tga´s, copy it from an original one and rename it to use with the .eff you want.

If you give us some more details, maybe I can help you more

See you!