Step 9: Nest The Smart Object Inside Another Smart Object
We’ve applied the Motion Blur filter, so we’re ready to add our second filter. This second filter will need to be applied to the entire image, and that creates a potential problem. We’ll need a separate mask for each of our filters, yet Photoshop only gives us one mask that’s shared between all Smart Filters applied to the same Smart Object. We’ve already used that mask to hide some of the motion bur effect, so how can we get a separate mask for our second filter?
The answer is simple. We just need to nest our existing Smart Object inside another one! To do that, with the original Smart Object selected in the Layers panel, click once again on the menu icon in the top right corner of the Layers panel: