Increases the base cost efficiency of Grade 4 and 5 Ore, Crystal and Gas for buildings.
What it costs to research each level, how long it takes, and the effect at that level.
| LEVEL | TIME | HARD CURRENCY | COST | EFFECT |
|---|---|---|---|---|
| Lv 1 | — | 0 | — | Choice Material Construction 0.1% |
| Lv 2 | — | 0 | — | Choice Material Construction 0.2% |
| Lv 3 | — | 0 | — | Choice Material Construction 0.3% |
| Lv 4 | — | 0 | — | Choice Material Construction 0.4% |
| Lv 5 | — | 0 | — | Choice Material Construction 0.5% |