/decal

name: unity-decal
description: Create and configure URP Decal Projectors. 创建与配置 URP Decal Projector。

Triggers

• Adding decals in URP
• Configuring a Decal Projector
• Enabling the Decal Renderer Feature
• 在 URP 中添加贴花、配置 Decal Projector、启用 Decal Renderer Feature

Decal Skills

URP Decal Projector creation and configuration (URP only; HDRP decal APIs are not covered here).

Operating Mode

• Query skills (`decal_get_info`, `decal_find_all`) are `SkillMode.SemiAuto` — they run in all three modes without grant.
• Mutating skills (`decal_create`, `decal_set_properties`, `decal_set_properties_batch`, `decal_ensure_renderer_feature`) are `SkillMode.FullAuto` — under **Approval** they need user grant (grant triggers one server-side execute returning the result); under **Auto** / **Bypass** they execute directly.
• `decal_delete` carries `SkillOperation.Delete` and is **auto-forbidden** in Approval / Auto modes (NeverInSemi). Only **Bypass** or the user-managed **Allowlist** can run it.

URP Package Stub

This module is compiled against `com.unity.render-pipelines.universal` (`URP`). When URP is not installed, **every** skill returns a stub `{ error: "Universal Render Pipeline package … is not installed." }` (`RenderPipelineSkillsCommon.NoURP()`). The stub is a diagnostic payload, not a permission denial — it does **not** require grant and is **not** treated as NeverInSemi.

Guardrails

**Routing**:

• For renderer feature management in general: `urp`
• For DecalProjector scene operations: this module

**Runtime-first rules**:

• Call `decal_ensure_renderer_feature` before assuming the current URP renderer is decal-ready
• Use `decal_get_info` / `decal_find_all` to discover real projector state before editing
• `decal_set_properties_batch` expects `items` to be a JSON array string
• This module targets the URP Decal workflow first; do not assume HDRP decal APIs are covered here

Skills

`decal_create`

Create a Decal Projector.

`decal_get_info`

Inspect a Decal Projector.

`decal_set_properties`

Modify Decal Projector properties.

`decal_find_all`

List Decal Projectors in the scene.

`decal_delete`

Delete a Decal Projector GameObject.

`decal_set_properties_batch`

Batch-edit Decal Projectors.

`decal_ensure_renderer_feature`

Ensure the target URP renderer has a DecalRendererFeature.

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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.