- Qt 5.15
- Qt 3D
- QML Types
- AlphaCoverage QML Type
- Qt 5.15.13 Reference Documentation

# AlphaCoverage QML Type

Enable alpha-to-coverage multisampling mode. More...

Import Statement: | import Qt3D.Render 2.15
Since: | Qt 5.7
Inherits: | RenderState

- List of all members, including inherited members

## Detailed Description

An AlphaCoverage type enables alpha-to-coverage multisampling mode. When enabled, the fragment alpha value is used as a coverage for the sample and combined with fragment coverage value. AlphaCoverage does nothing if multisampling is disabled. Alpha-to-coverage is most useful when order independent blending is required, for example when rendering leaves, grass and other rich vegetation.

It can be added to a RenderPass:

     RenderPass {
         shaderProgram: ShaderProgram {
             // ...
         }
         renderStates: [
             AlphaCoverage {},
             MultiSampleAntiAliasing {}
         ]
     }

Or to a RenderStateSet:

     RenderStateSet {
         renderStates: [
             AlphaCoverage {},
             MultiSampleAntiAliasing {}
         ]
     }

See also MultiSampleAntiAliasing.