how to convert normal map from Tangent Space to Object Space?

XzY

Hi) Does anyone know how to convert normal map from Tangent Space to Object Space? (or vice versa).

I know that «Handplane» can convert. But I couldn't find a description of the conversion process. Where is this magic button?

 + It hasn't been updated since 2017. Maybe there is another way to do this in 3Ds max or Marmoset? Or something else?

sprunghunt

Substance designer can do it. It's the same as baking a object space normal map but you supply a existing normal map as the input