Lost with shadows

I want this logo


to have the same sort of shadow as this one

How would I do that?
Thanks in advance

Greets, Pol

What you see are caustics, and only Yafray can make them. You need to place a photon light that kinda shoots the caustics through the glass object. So in the end you need at least two lights, one to light the scene, one to make caustics.

Thanks, I’ve been playing around with lighting but I’m a complete newbie…

Here’s what I came up with…


Greets, Pol