UE4中Blend_Overlay
官方文档中
Blend_Overlay will either screen or multiply the Base and Blend together. The function does a comparison on the Blend color such that wherever the Blend is brighter than 50% gray, the Base and Blend will be combined via a Screen operation. If the Blend is darker than 50% gray, the Base will be multiplied by the Blend as in the Multiply function.
| Item | Description |
|---|---|
| Inputs | |
| Base (Vector3) | The base, or original texture that will be blended with the Blend texture in some way. |
| Blend (Vector3) | The blend texture, which is combined with the base in some way based on the type of blend operation taking place. |
Blend_Overlay将屏蔽或将“基本”和“混合”相乘。 该功能对“混合”颜色进行比较，这样，只要“混合”比50％的灰度亮，就可以通过“屏幕”操作将“基础”和“混合”组合在一起。 如果“混合”比50％的灰度暗，则将“底数”乘以“混合”，如“乘”功能中一样。
简单的说就是亮的像素更亮，暗的像素更暗
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