Hi Gabriel,
Currently, it is not possible to move solutions between grids. However,
when defining an initial condition you may specify a functional form
that is permitted to depend on x, y, z. For example:
rho = sin(x + y) * z + 0.1
If all you have is a tabulation you might try performing a decomposition
of some description in order to obtain a functional form.
Regards, Freddie.