Plan-for-Adding-Diffusion-Effect.md

@@ -38,6 +38,16 @@
 1. Direction (for Directional only, like sunlight)
 2. Attenuation (for point light and spot light)
 
+</details>
+<details>
+<summary>
+
+## Ambient Light
+
+</summary>
+
+* Default lighting behavior involves ambient light to prevent complete dark area
+
 </details># Shading Model
 
 NA