How to add new types of Data Visualisations

Hello,

I would need to add new types of Data Visualisations (e.g. Funnels) to Kibana.

How can I do that? Which kind of technologies and libraries (e.g. CSS3, d3.js) should I use?
Is there any existing documentation about all this?

Thank you very much for your help,

Marco

We're working on extending this sort of functionality at the moment, for now you unfortunately need to DIY from scratch