Now the english language is not enough to describe it visually!?
You have given the best explanation on "density" till now but still haven't shown me how to see it visually
You see it by the following: the amount of space between fibers. When a bodybuilder contracts the muscle, if you can see the individual fibers, then the muscle is not very dense. If you can see some of the fiibers but not all, then the density is greater. If you can barely see a fiber and the muscle looks like a block with no lines in it(the lines being the separations between fibers), then the muscle is very dense. Dorian Yates, Mentzer, Robby Robinson, Branch Warren, Danny Padilla, Johhny Fuller, are all examples of bodybuilders with great muscular density.
SUCKMYMUSCLE