Glass
From Project Rebearth
Glass is a refined resource in Project Rebearth, produced at the Glassworks by processing 
Earth. It is consumed by the University for ongoing research and serves as a construction material for several high-tier buildings. 
Glass production is not available in the Arctic biome, making it a resource that must be imported or obtained through Expeditions in Arctic settlements.
Overview
The Glassworks converts 50 Earth/day into 5 Glass/day, consuming 0.5 
Tools/day in the process. It requires 10 workers and stores up to 50 Glass internally.
The University consumes 5 Glass/day alongside 10 
Coin/day to produce 10 
Knowledge/day, requiring 50 workers. Since the Glassworks produces 5 Glass/day and each University consumes 5/day, a single Glassworks can supply one University.
Glass is also a construction material for the Town Hall (20 Glass), University (500 Glass), and Museum (500 Glass). The Glassworks itself is not available in the Arctic Biome, so Arctic settlements must import Glass via Trade or obtain it from Expeditions.
Production
| Building | Glass Output |
Earth Input |
Tools Cost |
Workers | Notes |
|---|---|---|---|---|---|
| Glassworks | +5/day | -50/day | -0.5/day | 10 | Not available in Arctic |
The Glassworks is the only building that produces Glass. It requires a steady supply of Earth (typically from a Claypit) and a small ongoing Tools cost.
Production Chains
Research Chain
The primary chain consuming Glass. The Glassworks converts 50 Earth/day into 5 Glass/day (10 workers), and the University consumes 5 Glass/day to produce 10 Knowledge/day (50 workers). The University also consumes 10 Coin/day.
Consumption
| Building | Glass Rate |
Output | Workers | Notes |
|---|---|---|---|---|
| University | -5/day | +10 Knowledge/day |
50 | Also consumes 10 Coin/day
|
The University is the only building that consumes Glass as an ongoing operational cost. It converts 5 Glass/day and 10 Coin/day into 10 Knowledge/day.
Construction
Glass is required as a construction material for several high-tier buildings:
| Building | Glass Required |
Category |
|---|---|---|
| Town Hall | 20 | Town |
| University | 500 | Research |
| Museum | 500 | Research |
The University and Museum each require 500 Glass to construct, making them among the most glass-intensive buildings. The Town Hall requires a smaller amount of 20 Glass.
Storage
| Building | Volume | Notes |
|---|---|---|
| Center | 5,000 | Shared with all resources |
| Square | 10,000 | Shared with all resources |
| Warehouse | 5,000 | Shared with all resources |
| Glassworks | 50 | Glass only
|
Other Sources
Glass is one of the resources (alongside 
Wood, 
Stone, and Earth) that can be obtained from Expeditions. Expeditions yield a random basic resource at a rate of 15 per 1,000 hectares of explored area. This makes Expeditions an important supplementary source of Glass, particularly for Arctic settlements where the Glassworks cannot be built.
Glass can also be purchased from other players through the Market (up to 1,000 capacity) or the Port (up to 5,000 capacity).
Affected By
Glass production at the Glassworks is affected only by the all production modifier, which applies to every production building in the settlement. Since the Glassworks is a refined and manufactured category building (not food or resources), it is not affected by food production or goods production modifiers. The goods production effect targets only Wood, Stone, and Earth.
| Effect | Source | Multiplier | Type |
|---|---|---|---|
| All production | New Town Boost | 2 | Automatic (4 days) |
| Great Federation | 1.1 | Alliance type | |
| Science League | 0.8 | Alliance type |
