1= form and light
2=depth
refer to these websites for more info on both illusions
1- thevirtualinstructor.com/hatchingcrosshatching.html
2- www.udel.edu/artfoundations/beg_paintingtechniques.html
Chamber pretty much means an enclosed room or space especially one in a legislative building, or a group that meets for a particular purpose or within a particular space.
Hope this helps!
Just say yeah and Jk. Rowling isn't an author because she doesn't write realisticly
