Rendering the ligth bounce information into a cubemap from the obejct´s position can be a working approximation for dynamic models. That´s how Valve does it.
A 3d data blocks would require support for volume textures which is not given for Acknex yet, sadly. In fact CryEngine3 renders lighting information into cascaded 3d data blocks in realtime for their GI solution and it seems to work well even on consols.