Vertexix

Secondary / Third / Fourth Light

·

Three additional fill lights are available beyond the main Directional Light: Secondary Light, Third Light and Fourth Light. Each has an Enabled checkbox, an Azimuth offset slider (0–360°), an Elevation slider (-90–90°), a Color swatch, and an Intensity slider (0–5).

The Vertexix viewport with the default Secondary Light enabled as a back/fill light directly opposite the main Directional Light
The viewport with Secondary Light's default back-fill lighting added to the main Directional Light.

The azimuth-offset convention

None of the three lights has an independent azimuth — each one's azimuth is a fixed offset from the main Directional Light's own azimuth, so all four lights swing together and keep the same rotational spacing no matter how you orbit the key light. The offsets are chosen to spread all four evenly around the model rather than stacking a third light on top of the first or second:

  • Secondary Light — enabled by default. Offset 180° (directly opposite the main light), elevation 30°, intensity 0.5. A fill/back light.
  • Third Light — off by default. Offset 90°, elevation 30°, intensity 0.5.
  • Fourth Light — off by default. Offset 270°, elevation 30°, intensity 0.5.

Third and Fourth default off so a fresh install still looks like a simple 2-light setup.