Point, Layers and Transparency

As I am getting closer to finishing my first ever poster design, I thought it would be interesting to have a look at some theory from 'Graphic Design : The New Basics'.
So I first started reading about point, line and plane, which are the absolute basics of design that everybody should know about. But for my poster design, I thought that it would be important to concentrate on 'point'. I really liked the definition the book gave of point saying that 'a point can be an insignificant fleck of matter or a concentrated locus of power. It can penetrate like a bullet, pierce like a nail, or pucker like a kiss. A mass of points becomes texture, shape, or plane', because it points out that rather than being just an insignificant dot, the point is an important tool that can help to create loads of different things.
So why do I think the theory about point is important for my analysis? Well, as I decided that I'm going to use to different versions of a Bandstand photograph in my poster, the original picture in the background and a halftone version in the front, I think that the definition from the book is particularly helpful when having a look at the halftone picture of the Bandstand. As in the books definition this shows how 'a mass of points becomes shape', and in the case of my poster, it's the shape of the Bandstand.

Another thing that I thought would be interesting to have a look at in relation to my poster, is the book's definition of  layers. Since I started working with Photoshop and Illustrator I knew that I wanted to work with a lot of different layers in my poster because I think it is really interesting to see things overlapping, fading into each other,etc…
However, what is particularly interesting in 'Graphic Design : the New Basics' is that it also talks about layers in relation to transparency, a phenomenon which I also took into account while working on my poster.
'Transparency and layers are related phenomena. A transparent square of color appears merely pale or faded until it passes over another shape or surface, allowing a second image to show through itself'. 
This explains exactly what I am trying to do with my poster. I took the originally black and white Bandstand photography as a background and then put a pink rectangle with a transparency value of more or less 60% over it.

Although normally one should do this kind of research before starting to actually work on a design, I think that in this case it has helped me more to look at the different definitions and design tools after I nearly finished my poster, because it helps me to understand what I did and how the things that I did influenced my poster.