When to use real scale in Modeling?
 

I want to create 3D environments. This requires buildings such as a medieval castle. Do I need to worry about the scale if it is real or not? I started thinking about this when I realised I had to make each part separately (to be able to sculpt it separately in ZBrush), but then they need to match, and one way is the real scale. How is it do in film productions?

Jay would certainly know the answer to this for the film industry. But intuitively if you are modeling assets in a pipeline I would assume that there would be an agreed upon scale factor to ensure all the objects appeared in scale to each other.