But how do you open it then?
The meshes are located in a folder in Nival's format!
To convert it from this format to WRL, you need to use the mesh2wrl utility from the respected comrade CrazyPill (by the way, yesterday was his birthday
)!Brief instructions:
1) Create a folder, for example, "test", and copy the necessary files from the game archive folder (bin/geometries) into it. You can copy all of them, BUT there are many glitched and unused files in the game, so they may not be convertible!
2) Run the niv2wrl.bat file and wait!

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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1