convex mirror filter?

i want to know if it possible to create an wpe filter for this item:

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Thanks

And what you want the filter to do?

Hideki

show the position of boss type in the mini map, like the item do o.o

And how you wanna realize that? O.o
Its all serverside, if you could do that you could do it with every other item.

Hideki

im asking if it possible, you know you can get maya purple effect, so im wondering if it possible to do with this item