Realistic lighting in ursina!
I highly recommend using panda3d's built-in lighting (https://docs.panda3d.org/1.10/python/programming/shaders/shader-generator), which is more performant, uses better methods to work and still has the same amount of features as ursina lighting. The only thing missing is the water.
If you want to have realistic lighting in ursina, import the UrsinaLighting.py in your project and use the LitObject class instead of the Enity class. If you need help, ask me (https://discord.gg/ydXfhyb) or look in UrsinaLighting.py where you can find the source code and an example.