Vision

While the Shadowrun Fifth Edition Core Rulebook rules don't use range for all vision types like some other games do, the Foundry vision functions are all ranged based. Using the built-in systems available in Foundry keep things simple and clean — if a player can see an token in Foundry, they can take actions on that token.

The effective vision range is based on the Rating of whatever provides that vision, most commonly an optical and vision device. For items that can accept vision modifications (like helmets and ballistic masks), but don't have a Rating, use the Rating of the appropriate Sensor Housing — Rating 2 for helmets, Rating 5 for full body suits.

If the vision is granted by an Adept or Critter Power that does not have an inherent Rating, use the character's Magic Rating.

For Imaging Scopes and natural senses not granted via Awakening, treat as if Rating 6.

Apply Vision

/* For most technological sources. */
let rating = item.system.technology.rating;
/* For adept and critter powers. */
let rating = actor.system.attributes.magic.value;
/* You can also set a static value, for natural senses or special cases. */
let rating = 6;

Combine one of the above with one of the below. Change the angle to 30 for handheld items (scopes, cameras, etc).

Thermographic Vision

token.document.update({
  sight:
  { color: "#CC6600",
    range: (rating + 1) * 3,
    angle: 360
  }
});

Low-Light Vision

token.document.update(
{ sight:
  { color: "#CC6600",
    range: (rating + 2) * 4,
    angle: 360
  }
});

Remove Vision

Use this to remove the vision adjustments.

token.document.update(
{ sight: {
    color: null,
    range: 0,
    angle: 360
  }
});