Can you create a overlay png tilt-shift blur layer that is transferrable to any file.

Hey, having trouble finding any answers on this.

Can you create a tilt-shift blur overlay that is exportable and transferrable to any file? Similar to standard overlays (light flares, rain, snow etc etc).

For reference I launched the first generative photography project last year: https://opensea.io/collection/dreamlab-reflections

A 1111 piece project which had 150+ layers and each output was made up of a possible 6 layers picked at random by our code. It was all done in Photoshop, exported as PNGs and then using P5JS scripting/coding we launched the first on-chain generative photography project. Using this project as an example, imagine I wanted to add png blur overlay layer that I could export seperately and include in the 150+ layers, which would essentially be an overlay which, if it was randomly selected by the code, would blur part or all of the selected output. This would be simple to do with a png rain overlay file for example, but I am struggle to figure out how to do it with something that would essentially be clear like a blur layer.

Does this make sense? I am launching project 2 soon and hoping to figure out a way to have a seperate overlay blur layer.

Please elaborate. 

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I have a unique generative photography project and I want one of the layers of this project to be a toggle on/off tilt shift blur layer. 

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Would converting the whole layer-stack to a Smart Object and applying the Tilt-Shift as a Smart Filter not be more convenient? 

Edit: Other images could either be inserted in the Smart Object or the SO could be changed via Layer > Smart Objects > Replace Contents (or »Relink to File«)