How to set color opacity in Segments?

[rayliao]

Usually I use lineSegments, I can set by lineBasicMaterial, But I don't know how to do with Segments.

<lineSegments>
  <Segments lineWidth={0.1} limit={lines.length}>
    {lines.map((item, i) => (
      <Segment key={i} start={start} end={end} color={item.color}/>
    ))}
  </Segments>
  <lineBasicMaterial
    color="#fff"
    opacity={0.3}
    transparent
    vertexColors
  />
</lineSegments>

[rayliao]

Oh, use lineBasicMaterial is better for me.