Viewportframe blur effect?

Is there any way to blur viewportframes? I’m using viewportframe masking to create realistic reflections, and I want to blur it. Is there a way to do this, and if so, how could I go about it?

If you’re not using ScreenGuis to render said Viewports, decrease the PixelsPerStuds property

I am using a screengui, so I can’t just lower the resolution.

Then you sure can’t do the “viewport blur” method on it. Consider using a SurfaceGui on a part placed in front of the camera