RTF is a global modification that replaces all towns in the game.

You are wrong, and very much so. The Poles simply borrowed without asking – they had to be gently reminded of this. They generally like this approach, but they are, in principle, decent guys. I communicated with some of them for a while, and I still communicate with two of them – I gave them some models from the 6th game!

Just for your information, the Nagas from the 6th game are the work of the respected comrade zAhAr.

Added 1 minute ago

You can remove something and replace it with another something using an effect!
Oh my god, it's all so complicated and confusing.
Added 7 minutes ago

Not always, in general. The color of the effect is usually embedded in the effect file itself, and then any OTHER color in the texture is overlaid on the embedded color. This is controlled here:

false
30072015-0000-0000-0000-300720150001

and

true
30072015-0000-0000-0000-300720150001

Again, this doesn't always work, so you have to recolor the RGB color components of the NEW (for the game) file 30072015-0000-0000-0000-300720150001 in a hexadecimal editor – which is placed in Bin\effects\, but in the file itself, they are encoded in reverse, i.e., BGR.