Interesting notes: Infrastructure seems to be split into two tiers, low end: Safety Station, Infirmary, etc (stuff that provides small effect), and high end which requires engineers, and provides large bonus. I'm willing to bet its also more efficient use of materials in the end.
White nodes are resources obtained with Pioneers, gray are Settlers.
And to support Engineers the basic building is Art Cafe:
Gray nodes are Pioneers and Settlers
Security Drone Post and hospital provide larger boosts but require Engineers:
- Gray nodes: Pioneers and Settlers
- Blue nodes: Technicians
- Orange nodes: Engineers
