Is it possible to render in cycles refractive shadows through glass texture (as pictured)?

Example of realistic glass shadows

I have tried varying light bounces, specular lighting and increasing samples, perhaps my setup isn't powerful enough to try the very highest, although I am not sure that will enhance the refraction in the shadows - my current state of rendering (may download .blend file below):

enter image description here

Thank you in advance for your advice and help!

I have attached .blend file if this helps http://www.mediafire.com/file/wqycarzifbql3b6/Glasses.blend/file

  • 1
    $\begingroup$ Hello :). These are called Caustics, and unfortunately you can't really get a good result with Cycles. Related: Creating beautiful caustics in Cycles $\endgroup$ Oct 22 '20 at 10:49
  • $\begingroup$ Try Lux Renderer It has pretty caustics. $\endgroup$
    – Bruk
    Oct 22 '20 at 11:48
  • $\begingroup$ Thank you both - rapid helpful advice! I will investigate LuxCore Render engine now. $\endgroup$
    – Unreal
    Oct 23 '20 at 23:16