In the current version of the pynest microcircuit (implementation of the Potjans and Diesmann 2014 model) the error/warning messages are directly printed to the terminal.

Using the python warning package should probably be the preferred option.

For certain reasons, the subsurface scattering shader was removed from the shading drop down menu in the past. The shader is ready, but must be re-integrated again.

Instead, implement the behaviour of:
BlueBrain/NeuroM@2cc819e