This addon replaces shaders with toon shaders, pretty straight forward, just install and select the objects you want to toonify and go to the object panel to select the type of shader you want to modify (each one changes one or more types of shaders). it’s an invasive addon, it changes the nodes in materials and node groups, It can recover the original material, but not always. If for some reason you cannot alter the materials of selected objects, there’s an option for toonify all the materials in the blend file.
This scene is almost identical to the original, because the lighting comes from planes
This on the other hand has a main light
In this, I had to change the main plane light with a point light.
Toonify.zip (183.4 KB)