Using advanced design for tabbar icons

Greg_ru

Hi
I wanted to use "advanced" visuals for tabbar icons. By advanced i mean more than a simple small icon with 1 color, for example a picture in png, svg, or even a skiasharp view.
When i do so it just displays a big circle.

Here is the result i want (selected and non selected state):

And what i get (IconImageSource = a png resource):

I found literally nothing about this topic, everyone seems fine to use icons for tabs. But what if need to push the design a bit further?
Is it possible to create a custom renderer or control for tabbar?
Or it's a no go with xamarin?

Greg_ru

Anyone?