The viewmode commands are often used to diable lighting and thus useful for debug and creating reskins. Sadly, these commands were blocked with the Rush Hour update. I will still add them as they still work in TSW 2020.

viewmode lit
viewmode lit_detaillighting

viewmode unlit

viewmode shadercomplexity

shot -Takes a screenshot like you would with Ctrl+F12
shot showui - Takes a screenshot with UI and saves it in the same folder as it would with Ctrl+F12 (Not compatible with different screenshot qualities!)