With regards to Scale, are there rules for hitting a weak spot in the D6 System (either in a space craft, giant, or building)?
There is nothing specifically stated, but the last paragraph of the “Scale” section implies it. The gamemaster decides on the scale of the target and includes a difficulty modifier for the called shot. Do you have any guidelines for how to handle very tough objects that aren’t neccesarily mega-size? In D6 Adventure, for example, a tank is +10. This is too easy to damage, if you ask me. It should be impervious to small arms fire and deal out massive damage. Scale does not take into account armor or Toughness (inanimate object’s damage resistance value). So, the tricky part is to give the tank the right combination of armor and Toughness while taking into account its scale and what you want the weapons to do. Unfortunately, we don’t have any more specific suggestions than that at this time.