Set layer blend mode to screen (this will make black dots invisible).Then, use layer effects (such as inner glow, drop shadow, bevel and emboss) to make dots look like bubbles.

• 将图层混合模式设置为滤色（这会让黑色的点不可见），然后应用图层样式（内发光，投影，斜面和浮雕）让圆点看起来更像泡泡。