ie:
- floating platform to be build (e.g. above water / mud) allowing build structures on them
- hovering platform in air to be build (e.g. above acid / lava) allowing build structures on them
and
- concrete plates (low profile like in Dune2) allowing build structures on them (can be expanded to roads / railroads usage for faster movement)
- walls (high profile) allowing place units / defense / scout structures on top of them (suitable for "castles" etc usage)
support for this will be useful for "out of TA" genre mods (like MAX/MAX2 etc) ...
2. How hard will be to implement "real" river streams / lava streams ? (these who knows latest SimCity editions understood)
rivers can work like "natural" roads (downstream movement of ships is faster than against it etc).
i hope it will be possible one day in future

any comments / thoughts / critic? :)