Indirect light is light that reaches the viewer from below 45° above the girdle plane. Our light map shows it in green.
In more detail
Low-angle light is softer and less dependable than light from above. In moissanite, the T73 trades much of its direct light for indirect light.
How we measure it
The simulator's light map counts light from below 45° elevation as indirect.
Related terms
- Light Return: Light Return sorts each point of a face-up stone by the direction its light came from. Its four classes, direct, indirect, contrast and leakage, together cover the whole face-up stone.
- Light map: A light map is a face-up picture of a cut stone, colored by the direction each point's light came from. Red is direct light, green is indirect light, blue is contrast, and a dark color is leakage.
- Direct light (Light Return): Direct light is light that reaches the viewer from 45° to 75° above the girdle plane. Our light map shows it in red.
- Contrast (Light Return): Contrast is the part of a face-up stone whose light comes from 75° or higher above the girdle plane. This zone lies within 15° of the line of sight, where the viewer's head is.