need help on castable 3d model

[kumarmator]

i have a model that need to be converted in to solid
castable model via 3d printer.

this is the work i am doing for a client and he
asked me to give a volume in the model .

so...anyone here who know how to convert 3d model into
castable model.

Thanx

[mremix]

try xport IGES from C4D