Since the Gamma input of Gamma, Gamma Curve and Levels components is a map input, Filter Forge uses values ranging from -100 to 100 instead of the commonly accepted gamma range of 0.1 to 10. The following table shows the 'real-world' gamma values with their corresponding Filter Forge percentages:
| Filter Forge Percentage | Gamma |
| 100 | 10 |
| 80 | 6.309573445 |
| 60 | 3.981071706 |
| 40 | 2.511886432 |
| 20 | 1.584893192 |
| 0 | 1 |
| -20 | 0.630957344 |
| -40 | 0.398107171 |
| -60 | 0.251188643 |
| -80 | 0.158489319 |
| -100 | 0.1 |
