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Official statement on this issue
You can come up with whatever you want; firstly, I can't forbid it, and secondly, I don't want to, because it is very difficult to establish certain boundaries and, in my opinion, it is practically impossible to cover every possible detail. I have no problem with cosmetic elements; for example, a player wants to describe that in their country they film certain movies and there is a certain traditional music, and the level of culture there is very low - there is no problem with this; it can:
1. Exist but not be too common in your country at the present time for various reasons (for example, after changing my country, I wrote about the ideology of the government, mentioned national and family values there - this is what my country strives for, that is, there may be similar manifestations, but due to some unfavorable things, there is no such thing everywhere, this can be indicated by a large indicator of poverty, etc.);
2. Exist on an ongoing basis; such concepts as "culture" are sometimes too vague, and it is sometimes difficult to draw the necessary line.
And the description of many other cosmetic things, I leave to the discretion of the players. Let's say the environmental indicator in your country is negative. What does this mean? It can definitely be said that the environment is in poor condition. But how poor? Is it everywhere? This can no longer be determined. The numbers don't say anything about this; they can only be compared with each other. Or such things as "politeness." I can't force a player to write that in their nation, people spit in faces, and they react politely, saying, "Thank you, sir, that made me feel better!" If they want to, they will write it themselves. This applies to all such things. But if the question is posed differently, let's say, who has more rude or polite citizens in their country, or where there is more freedom in general - then we turn to the numbers.
But as for things that go beyond "cosmetic elements" - it's a little more complicated. It would seem that "my state owns another continent and ten galaxies" or "people in my country possess magic!" - such a description does not affect anything. An Olympics or any other event takes place - such a description will not have any effect on anything at all. But you can look at it from another angle. I am not only a host, but also a player, and therefore I can assess this situation from an objective point of view. I am negotiating with the government of Greatwater or deciding to go to Shailion - I am guided by what I know about these countries. Even some fictional (within reason) animals are normal; they do not necessarily have to correspond to earthly fauna. Kvasardastan has a dictator, there are various corporations fighting for power, there is a terrible environment, and there are many other things described in the description of the state; I, "the leader of Rex Ventorum," am negotiating with this state or deciding to postpone my trip there, or something else, and I have no problems with this. Because all this is good and understandable, logical and reasonable. But if I proceed from the fact that the country with which I am negotiating has another galaxy behind it, I somehow feel uncomfortable. Or that in another country, people can travel through time. Or that one of the countries was once the owner of the planet and is the ancestor of all cultures and states. Or that some people in a country live who are super-people who do not die and can do everything. I understand that all these examples are exaggerated, but the point should be clear.
Therefore, all such things from my side go to the same shelf where the history textbooks of one well-known country could be; if such "fantasies" are used in role-playing, then it is a little different - I can remember the reason for the refusal, why the government of my country did not invite the Mushrooms to the first summit of the Actea Security Council.
You can say that it's dishonest-dishonest, I've already come up with and written it, and I did it even earlier, no, I did it, but I will ask another question: is it honest in relation to other players? No, it's not. I refused the Shaman in telekinesis; why? For the reasons mentioned above.