Transfer textures make it possible to use original textures on models even after the UVs have been changed on a model.
When baking transfer textures, the U and V coordinates of the original UVs are baked into a texture. Each value on the transfer texture specifies a position on the original UV map.
Original model vs remeshed model with new UVs and transfer texture
In the material editor of a DCC software of choice, set the RG outputs of the
transfer map and plug them into the UV coordinates of the
original texture to remap the UVs.
Shader setup in Maya using the Transfer texture to drive the original textures UV coordinates