Mitsuba (https://mitsuba.readthedocs.io/en/latest/index.html) looks like a very high-quality physically-based renderer that would be very straightforward to implement and use for nice static images.
Mitsuba (https://mitsuba.readthedocs.io/en/latest/index.html) looks like a very high-quality physically-based renderer that would be very straightforward to implement and use for nice static images.