Materials will be basically unlimited. Just a few simple guidelines (more details will be posted on the actual announcement):
- Type of station (pirate, neutral, traders) has to be specified
- A certain color pallet should be used to identify the type (bluish for traders, reddish for pirates)
- no names of groups/etc are allowed as blocks on the stations (stations will be credited in the files)
- don't use too many valuable blocks as players raiding will be able to mine them
- Turrets are encouraged on pirate and trader stations
- Neutrals should be made look to be abandoned
this is just what I can come up with atm.
Also, currently, display block content isn't saved with the blueprint, but that will be added with the next update.