Not sure why this is happening but if i turn on the rtx tracing in the worlds that are given all textures except light and when you're in a liquid becomes black. My laptop is a Asus scar 2 with a 2070 or 2080 i don't remember which and an i7, I tried to run all maps but it turns out black unless i turned off the direct ray tracing in advanced video options. 

 
I uploaded 2 images of before and after i activated ray tracing as well as a video of what i did