材质与光照贴图和光照探针的交互方式。
| None | 发射光照完全不影响全局光照。 |
| RealtimeEmissive | The emissive lighting will affect Enlighten Realtime Global Illumination. It emits lighting into real-time lightmaps and real-time Light Probes. |
| BakedEmissive | 发射光照影响烘焙全局光照。它将光照发射到烘焙光照贴图和烘焙光照探针中。 |
| EmissiveIsBlack | 发射光照保证是黑色的。这样光照贴图系统可知道不必从材质中提取发射光照信息，可以直接假设它是完全黑色的。 |
| AnyEmissive | Helper Mask to be used to query the enum only based on whether Enlighten Realtime Global Illumination or baked GI is set, ignoring all other bits. |