When a campfire particle becomes transparent before disappearing, the occluded parts of other campfire particles behind it will not be rendered.

营火粒子在消失前变为透明时，它后面的其他的营火粒子的被遮挡部分不会渲染。

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It seems like smoke particles have a hole.

请查看我发送的附件 这好像是烟雾粒子中有一个洞。