Hello,
In Bloodborne, when you apply fire or bolt paper, or empty phantasm shell on a weapon, said weapon will glow with the relevant effect.
However, this effect is not applied to weapons who have been "infused" with elemental gems. So if you have a fire gem in your saw spear, it will still look like a regular saw spear (though the fire effect will be shown on the enemies when you hit them).
So I'm looking for a patch to "fix" this (although it was probably intended this way).