Water element doesn't change it's dimension when setElementDimension is used. Probalby the same applies to interior.
It would be nice to have it possible.
Confirmed. btw. all GTA water in map area are only visible in interior 0 but water outside area are visible in interior 0 and 5 (MaddDogg mansion with pool).
And when it can be repaired? Its very important because this bug prevents from doing many systems.