Thanks for the replies. But what's your opinion about having a level composed of a single Model? Just one big model.
I've actually seen a the tutorial regarding this in the Acknex downloads page. Also, should one choose to use one big model for a building instead of a stage composed of level blocks, would the entity.polygon flag be that reliable or would it still cause incosistencies like stucking or sinking etc? Would there be frame rate penalties?