Here's attempts with a glass of water and settings "caustics".
looking good, Marek and I
do know it's not easy. Sometimes the slightest adjustment with the materials IOR values makes it or breaks it.
"What do I know, I'm still learning"..
Windows 7 64 bit HP > 2019-2018-2017, TurboCad Platinum 21,20,19 and 18.Using LightWorks, Anilab lab 5. HP all in one 23" Touch smart screen with Nvidia Geforce 210, open gl 3.3. Intel Core i5 ,2.27GHz,4 GB ram.