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- Create a new empty layer.
- Load selection for the liquid shape. And create spot like on the image below with large soft brush.
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- Apply Dissolve Blending Mode to this layer and Opacity 40%.
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- Merge created dissolved layer with an empty ne layer and apply Opacity 50%.
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- Duplicate dissolve layer and apply to the bottom copy Gaussian Blur filter.
- You should get similar result.
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- Make visible one of the base shapes.
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- Apply following settings.
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