My colleague just told me that he does not think that Gaussian Blur effects are scaling. I asked him if he had the preference checked and he does. I ran a test myself, a simple box with a Gaussian Blur effect added, then scaled the box by 50%. The effect did not scale.
Gaussian Blur is one of the Photoshop style effects. I am afraid you will have to redo it to scale.
It never scale, we need to do manually, then only will come properly. don't know why, but i have good practical experience with this Gaussian Blurs.
This is not only about scale, this is about raster also. If you create a document in 72 dpi and change that document raster to 300 dpi. then blur won't change. complete effect will get differ. So now the only solution need to do manually.
It is because the Photoshop type effects are raster, not vector.
Illy was mobbed to include raster effects and filters, but she does not really understand them.