Texture part 2

Here's the progress of painting the textures:

Basically, I searched for references of the object and obseve the patterns, where the darker and lighter areas are at. I used Clip Studio Paint as I prefer most of the tools there, such as Blend tool. Another example is the drain is painted using a chalk-like tool to create an uneven look. I haven't removed the line art as I'm still working on it.

Note to self and whoever reading this: In my opinion, Texture is the pattern on the object, and Material is how the object deals with light (reflect or refract?).