クッキーとは、ライトの上に置いて、特定の形や色の影を作り、ライトの外観や強度を変えるマスクのことです。クッキーは、ランタイムのパフォーマンスへの影響を最小限またはゼロに抑えながら、複雑なライティング効果をシミュレートする効率的な方法です。クッキーでシミュレートできる効果には、コースティクス、ソフトシャドウ、ライトの形状などがあります。
Unity でライトにクッキーを適用するには、Cookie フィールドの Light コンポーネント にテクスチャを割り当てます。
Unity で使用できる様々なレンダーパイプラインの詳細については、レンダーパイプライン を参照してください。
The Built-in Render Pipeline supports cookies for Enlighten Realtime Lights, and for Baked Lights and Mixed Lights when you use the Progressive Lightmapper. Realtime Global Illumination only provides indirect light. If your game only uses real-time lights, your render pipeline provides your direct lighting and Enlighten Realtime Global Illumination provides the indirect lighting. The Built In Render pipeline supports cookies for the direct lighting it provides, but Enlighten Realtime Global Illumination does not support cookies for the indirect lighting it provides. For this reason, direct lighting takes cookies into account while indirect lighting does not. In the Built-in Render Pipeline, cookies only use data from the alpha channel. This means that you can define a shape for a cookie, but not a color. For more information on cookies in the Built-in Render Pipeline, see Creating cookies for the Built-in Render Pipeline and Texture Type: Cookie."
URP supports cookies for Realtime Lights, and for Baked Lights and Mixed Lights when you use the Progressive Lightmapper. In URP, cookies use data from the RGB channels. As a result, you can define a shape and a color for a cookie.
For more information on cookies in URP, see the URP Light component reference.
HDRP supports cookies for Realtime Lights, and for Baked Lights and Mixed Lights when you use the Progressive Lightmapper. In HDRP, cookies use data from the RGB channels. As a result, you can define a shape and a color for a cookie.
For more information on cookies in HDRP, see High Definition Render Pipeline/Built-in Render Pipeline comparison, Lights in the High Definition Render Pipeline and the HDRP Asset.
Unity 2020.1 以降で作成されたプロジェクトでは、プログレッシブライトマッパーのベイクしたライトと混合ライトでは、デフォルトでベイクしたクッキーが有効になっています。2020.1 以前のバージョンの Unity で作成されたプロジェクトでは、プログレッシブライトマッパーのベイクしたライトと混合ライトでは、デフォルトでベイクしたクッキーが無効になっています。これは後方互換性を提供するためです。
プログレッシブライトマッパーのベイクしたライトと混合ライトのクッキーを有効にするかどうかは、エディター設定 ウィンドウで切り替えることができます。
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