Unity Light Skills

BATCH-FIRST: Use *_batch skills when operating on 2+ lights.

Guardrails

Mode: Full-Auto required

DO NOT (common hallucinations):

• light_add does not exist → use light_create (creates a new light GameObject)
• light_set_color / light_set_intensity do not exist → use light_set_properties (sets color, intensity, range, shadows together)
• light_delete does not exist → use gameobject_delete on the light's GameObject
• light_set_shadow does not exist → use light_set_properties with shadows parameter ("none"/"hard"/"soft")

Routing:

• For lightmap baking settings → light_get_lightmap_settings (this module)
• For reflection probes → light_add_reflection_probe (this module)
• For light probe groups → light_add_probe_group (this module)

Object Targeting: All single-object skills accept name (string) and instanceId (int, preferred). Provide at least one. path (hierarchy path) is also accepted where noted.

Skills Overview

Single Object	Batch Version	Use Batch When
light_set_properties	light_set_properties_batch	Configuring 2+ lights
light_set_enabled	light_set_enabled_batch	Toggling 2+ lights

No batch needed:

• light_create - Create a light
• light_get_info - Get light information
• light_find_all - Find all lights (returns list)

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Light Types

Type	Description	Use Case
Directional	Parallel rays, no position	Sun, moon
Point	Omnidirectional from a point	Torches, bulbs
Spot	Cone-shaped beam	Flashlights, spotlights
Area	Rectangle/disc (baked only)	Windows, soft lights

---

Skills

light_create

Create a new light.

Parameter	Type	Required	Default	Description
name	string	No	"New Light"	Light name
lightType	string	No	"Point"	Directional/Point/Spot/Area
x, y, z	float	No	0,3,0	Position
r, g, b	float	No	1,1,1	Color (0-1)
intensity	float	No	1	Light intensity
range	float	No	10	Range (Point/Spot)
spotAngle	float	No	30	Cone angle (Spot only)
shadows	string	No	"soft"	none/hard/soft

Returns: {success, name, instanceId, lightType, position, color, intensity, shadows}

light_set_properties

Configure light properties.

Parameter	Type	Required	Description
name	string	No*	Light object name
instanceId	int	No*	Instance ID (preferred)
r, g, b	float	No	Color (0-1)
intensity	float	No	Light intensity
range	float	No	Range (Point/Spot)
shadows	string	No	none/hard/soft

light_set_properties_batch

Configure multiple lights. Each item accepts: name/instanceId/path (identifier) + r, g, b, intensity, range, shadows (all optional).

Parameter	Type	Required	Default	Description
items	json string	Yes	-	JSON array of per-item objects (see example below)

Returns: {success, totalItems, successCount, failCount, results: [{success, name}]}

unity_skills.call_skill("light_set_properties_batch", items=[
    {"name": "Light1", "intensity": 2.0, "r": 1, "g": 0.9, "b": 0.8},
    {"instanceId": 12345, "intensity": 1.5, "shadows": "soft"},
    {"name": "Light3", "intensity": 2.0}
])

light_set_enabled

Enable or disable a light.

Parameter	Type	Required	Description
name	string	No*	Light object name
instanceId	int	No*	Instance ID
enabled	bool	Yes	Enable state

light_set_enabled_batch

Enable or disable multiple lights.

Parameter	Type	Required	Default	Description
items	json string	Yes	-	JSON array of per-item objects (see example below)

Returns: {success, totalItems, successCount, failCount, results: [{success, name, enabled}]}

unity_skills.call_skill("light_set_enabled_batch", items=[
    {"name": "Torch1", "enabled": False},
    {"name": "Torch2", "enabled": False},
    {"name": "Torch3", "enabled": False}
])

light_get_info

Get detailed light information.

Parameter	Type	Required	Description
name	string	No*	Light object name
instanceId	int	No*	Instance ID

Returns: {name, instanceId, path, lightType, color, intensity, range, spotAngle, shadows, enabled}

light_find_all

Find all lights in scene.

Parameter	Type	Required	Default	Description
lightType	string	No	null	Filter by type
limit	int	No	50	Max results

Returns: {count, lights: [{name, instanceId, path, lightType, intensity, enabled}]}

light_add_probe_group

Add a Light Probe Group to a GameObject. Optional grid layout: gridX/gridY/gridZ (count per axis), spacingX/spacingY/spacingZ (meters between probes).

Parameter	Type	Required	Default	Description
name	string	No	null	GameObject name
instanceId	int	No	0	Instance ID
path	string	No	null	Hierarchy path
gridX	int	No	0	Probe count on X axis
gridY	int	No	0	Probe count on Y axis
gridZ	int	No	0	Probe count on Z axis
spacingX	float	No	2	Meters between probes on X
spacingY	float	No	1.5	Meters between probes on Y
spacingZ	float	No	2	Meters between probes on Z

Returns: { success, gameObject, probeCount, existed, hasGrid }

light_add_reflection_probe

Create a Reflection Probe at a position.

Parameter	Type	Required	Default	Description
probeName	string	No	"ReflectionProbe"	Probe name
x, y, z	float	No	0,1,0	Position
sizeX, sizeY, sizeZ	float	No	10,10,10	Probe box size
resolution	int	No	256	Cubemap resolution

Returns: { success, name, instanceId, resolution, size }

light_get_lightmap_settings

Get Lightmap baking settings.

No parameters.

Returns: { success, bakedGI, realtimeGI, lightmapSize, lightmapPadding, isRunning, lightmapCount }

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Example: Efficient Lighting Setup

import unity_skills

# BAD: 4 API calls
unity_skills.call_skill("light_set_properties", name="Light1", intensity=2.0)
unity_skills.call_skill("light_set_properties", name="Light2", intensity=2.0)
unity_skills.call_skill("light_set_properties", name="Light3", intensity=2.0)
unity_skills.call_skill("light_set_properties", name="Light4", intensity=2.0)

# GOOD: 1 API call
unity_skills.call_skill("light_set_properties_batch", items=[
    {"name": "Light1", "intensity": 2.0},
    {"name": "Light2", "intensity": 2.0},
    {"name": "Light3", "intensity": 2.0},
    {"name": "Light4", "intensity": 2.0}
])

Minimal Example

unity_skills.call_skill("light_create",
    name="Sun", lightType="Directional",
    r=1, g=0.95, b=0.85, intensity=1.2, shadows="soft"
)

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Best Practices

1. Use Directional light for main scene illumination
2. Point lights for localized sources (lamps, fires)
3. Spot lights for focused beams (flashlights, stage)
4. Limit real-time shadows for performance
5. Area lights require baking (not real-time)
6. Use intensity > 1 for HDR/bloom effects

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Exact Signatures

Exact names, parameters, defaults, and returns are defined by GET /skills/schema or unity_skills.get_skill_schema(), not by this file.