What is a codex-style of painting ?

Its stylistic characteristics include fine-line painting using a monochrome black-brown slip (a clay-based paint pigmented with black iron oxide, manganese and/or plant-based compounds) applied on a light cream-colored background.
Variations in line tone achieved by degrees of dilution of the paint, red-painted rim and basal bands delimiting the pictorial field or page,and pictorial narratives featuring supernatural beings and classic myths.

Ineed the list of artworks and characteristics.

Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.