Interior skills can be researched at the Natural Institute.

Resources Edit

• Planting : +5% Food yield for all your cities.
  • Food Skill : +2% chance of getting Flooding Plains when Terraforming to Plains.
• Digging : +5% Sand Stone yield for all your cities.
  • Geology : +2% chance of getting Deep Lake when Terraforming to Lake.
• Smelting : +5% Metal yield for all your cities.
  • Metalurgy : +2% chance to get Mine Mount when Terraforming to Mountain.
• Lumbering : +5% Wood yield for all your cities.
  • Woodcutting : +2% chance to get Dense Forest when Terraforming to Woods.
• Extraction : +5% Crystal yield for all your cities.
  • Gemology : +2% chance to get Crystal Desert when Terraforming to Desert.

Production Edit

• Forging : -5% Metal material required for Weapons produced in the Arsenal. lvl 8: 169 SP. lvl 9: 332 SP lvl 10: 613 SP
  • Weapon Theory : -5% Weapon production time in the Arsenal.
• Craft : -5% Wood material required for Frames in the Carpenter's Workshop.
  • Airship Theory : -5% Frame production time in the Carpenter's Workshop.
• Magic Transfer : -5% Crystal material required for engines in the Energy Workshop.
  • Dynamics : -5% Engine production time in the Energy Workshop.