Anybody know, why lens blur not work on smart object?

[Eko Wardoyo]

Until now i can not figureout about this problem,

My lens blur always greyed out (disable) on smart object.

How to fix this? thanks

[Brad @ Roaring Mouse]

Lens Blur is a destructive filter so it cannot work on a Smart object as the others do. In this case you have to rasterize your layer or, if it was just an image layer anyway, don't make it a smart object.

[Michael Bullo]

Just expanding on what Brad @ Roaring Mouse has already nicely explained. In this situation I duplicate the Smart Object and hide the visibility of the original. I then rasterize the duplicate and apply the filter. If I need to adjust the blur I'll throw away the layer and repeat the process with different settings.

[Bojan Živković]

Instead of rasterizing duplicated SO layer one can edit it and apply destructive filter in case editor wants to build on top using available non destructive filters.

[Michael Bullo]

Nice suggestion @Bojan Živković 

[alexanderl16240166]

I just came across this while looking for something else about Lens Blur and even though this is old I felt the need to jump in as all of the replies in here are incorrect. Lens Blur CAN work on a smart object, it just isn't enabled by default (don't ask me why..). Photoshop used to come with a script to enable it, and it's still available from Adobe, but now you have to jump through some hoops:
Go to this downloads page: https://helpx.adobe.com/photoshop/kb/downloadable-plugins-and-content.html
On that page, download Scripting Listener, either the windows version or the macOS pre-2019 version (It doesn't matter which, you don't actually need Scripting Listener).
Unzip or mount the DMG of the version you downloaded, then go to the Sample Scripts folder, then Javascript
Inside that folder is a script called "EnableAllPluginsForSmartFilters.jsx". Run this script from Photoshop (File > Scripts > Browse, choose that script)
That't it! You can now use Lens Blur as a smart filter!

[didiermazier]

very interesting. I will give a try!

[didiermazier]

did it and it doesn'work. The downloade file is not a DMG but a zip file. Once extracted you just get a "ScriptingListener.plugin" not extractable… and not the files and folders you mentionned

I maybe missed something…