Lens Blur problems

Question

So I'm trying to make a shadow effect on some text using lens blur, so that the blur is tight at the top of the image and blurry lower down. I'm using an alpha channel to control the difference in blur strength. But no matter what I do I can't stop it from doing this:

The text is on a layer of its own with a transparent background. It needs to have the transparent background for future use. The red layer is there just to illustrate the problem..

Why am I getting a grey blur at the bottom and right of the text?

All suggestions hugely appreciated

davescm · Accepted Answer

As an alternative you could make a 3D extrusion from your text then use the depth of field on the 3D "camera" to give that same effect.Dave

davescm · Answer

Yes I can replicate that here, it looks like a bug. It only happens when lens blurring with transparency

Before :

After with separate layers (i.e. the black is on a transparent layer) :

After with merged layers (i.e. red and black on same layer)

Dave

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