Water caustics refracting to roof etc

is there anyway this is possible? i want to create a semi flooded indoor world and i would want this in my world but i have no idea how (i dont have any water stuff either i dont know how to do that stuff either)


If you want to do something like this, Mochie Water shader and/or Mochie Underwater Visual shader should able to do the job. If you don’t plan to add 3D water wave, Mochie Water shader should able to create acceptable water effect without workaround (at least for free version).
(The water surface in this screenshot used multiple shader to create)