HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

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I tried installing the file (from the useful information) to display mana, but the result is the same:( If you can ignore the display of troops in numbers for the opponent, then the mana display in battles can be critical. I don't know how to calculate mana...

I installed Complete English and HD on top of it, and it displays mana! But there's a problem with it - it doesn't display Russian; maybe there's a way to install a Russian codec on it so that instead of gibberish, there are letters?
Consequently, the mana problem should occur for all Complete Russian versions when HD is installed on them.