How to make squared light

Hi,

This is the result of what I’m trying to do:
image

In the picture, you can see a sort of plane that is above the ground, and I want to make a squard light beneath this plane.

I tried to find a squared light but couldn’t find any result.

It is called area lighting. It is not supported yet by Babylon.js

One idea would be to use mirrors maybe?
Reflections and Refractions | Babylon.js Documentation

Or dynamic IB like here:
Reflection Probes | Babylon.js Documentation