Can you add a xBRZ Filter like Sonic 3 A.I.R? it will make the game have a better look and the sprites will look more rounded and cleaner. so it will be nice if you will add a xBRZ Filter.
I won't be able to insert such a filter as the game runs on native resolution of 320x224 and filters like xBRZ work on an upscale of the native resolution.
As far as I know for Fusion 2.5 filters stay on the same resolution of the game frame they are in and I can't apply a filter based on the window frame because the game ignores it.
I am working on a "old TV" filter of sorts though, and I'll release it in a future patch.