Depending on the coloration of the material in of the texture and how rough it is, several feet to hundreds of yards/meters away.
But the reason brutalism is easier to see far away is more about the solid rectangular shapes and style than the texture of the material. If you made a concrete version of a building normallly made of stone with lots of fine details like a cathedral it wouldn’t be considered brutalism just because it was all concrete.
Depending on the coloration of the material in of the texture and how rough it is, several feet to hundreds of yards/meters away.
But the reason brutalism is easier to see far away is more about the solid rectangular shapes and style than the texture of the material. If you made a concrete version of a building normallly made of stone with lots of fine details like a cathedral it wouldn’t be considered brutalism just because it was all concrete.
You can see the texture of a wall from hundreds of yards away? You have better vision than I do Legolas.