A test with „The Streets Of Venice“ by Stonemason.
The rendering was stopped after 10 hours - 17% - 219 iterations.
There are a lot of untouched pixels on the water and I guess it would take days
to finish the render process.
I had a lot of problems with this model. It is well made and beautifully textures.
(Doors and windows cannot be opened!)
But the lighting is problematic. When I tried to light some darker areas
with a ghost light, the whole picture turned white.
The model in the foreground is Cassie by Marissko/renderhub,
the dress is made by Lully/DAZ.

Thanks for looking.