The blend modes for the layers of LayerShader. 
 | 
| enum   | BlendMode {  
  BlendNormal, 
 
  BlendMultiply, 
 
  BlendScreen, 
 
  BlendOverlay, 
 
  BlendHardLight, 
 
  BlendSoftLight, 
 
  BlendDodge, 
 
  BlendBurn, 
 
  BlendDarken, 
 
  BlendLighten, 
 
  BlendAdd, 
 
  BlendSubtract, 
 
  BlendDifference, 
 
  BlendExclusion, 
 
  BlendHue, 
 
  BlendSat, 
 
  BlendColor, 
 
  BlendLuminance, 
 
  BlendLevr, 
 
  BlendAlphaMask
 
 } | 
|   | 
◆ BlendMode
| Enumerator | 
|---|
| BlendNormal  | Normal.  
 | 
| BlendMultiply  | Multiply.  
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| BlendScreen  | Screen.  
 | 
| BlendOverlay  | Overlay.  
 | 
| BlendHardLight  | Hard light.  
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| BlendSoftLight  | Soft light.  
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| BlendDodge  | Dodge.  
 | 
| BlendBurn  | Burn.  
 | 
| BlendDarken  | Darken.  
 | 
| BlendLighten  | Lighten.  
 | 
| BlendAdd  | Add.  
 | 
| BlendSubtract  | Subtract.  
 | 
| BlendDifference  | Difference.  
 | 
| BlendExclusion  | Exclusion.  
 | 
| BlendHue  | Hue.  
 | 
| BlendSat  | Saturation.  
 | 
| BlendColor  | Color.  
 | 
| BlendLuminance  | Luminance.  
 | 
| BlendLevr  | Levr.  
 | 
| BlendAlphaMask  | Alpha mask.  
 |