Following an imposed in-depth study of the hybrid scenario model, and an analysis of my *Double Element*, I developed the concept of visual obstruction. I therefore dedicated this week to developing several test models in which the stated concept is studied, calculated (when required), and played with. The main goal was to loosely implement previously seen elements and programs of Lausanne and Paris, either based on the original scale plans, or on the developed hybrid, and *Double Element, *within visually obstructive planes, blocking a certain viewing angle. By doing so, I am imposing the generic viewer the requirement to observe the created space from a different angle to be able to simply see the aforementioned space.

In this following test, the visual obstruction was calculated for only one eye (parallax was not taken into account) with a small height from the top plane of just 866[mm]. With such a low height, the size ratio between the two planes can be greatly increased (1.78x in this case). It should be added that the large ground plane could be smaller, making the obstruction more effective, but since this is a test, I decided to push the plane sizes to their maximum. The sequence of vertical planes are an increasing extrusion of a flat element from Lausanne (painted guide lines on the street). The extrusion is linear and can be summed up by defining the shortest vertical plane as *n *and all the other vertical planes as a multiplication of *n. *This linear extrusion falls in line with the concept of instancing developed during the previous week.

The above test, albeit smaller than the previous test, proves to be more interesting in terms of obstruction as the added lateral cover allows obstruction from a second main viewing angle. This test also takes into account the parallax of having both eyes open but due to the great weight of the lateral cover, the addition of an "invisible" bottom plane was not possible and was replaced with stacked cardboard acting as a counter-weight.

This test is the most generic visual obstruction test - coverage of a plane of the same size with a slight angle (defined by the angled part of the top plane) thrown into the equation. Again, parallax is taken into account.

This model is different from the rest. There is no "game" with obstructing larger planes with smaller planes, etc. Instead, this model is directly influenced by the *Double Element - *a window that focuses the view of the observer in a specific area. This time around though, the observer is looking into an inside space instead of an outside space. This creates a sort of diorama space for showcasing other models. The reason why I made this model is that it could be used to "enforce" the hidden view point of a visually obstructive element. The angle of the window can of course be modified for any viewing height, and the addition of other windows is possible and possibly required (one for the obstructed view, another for the unobstructed view). This model is therefore a container.

My final model is a development/advancement of my parallax calculations. The extremities are curved towards the observer to greatly increase edge coverage when observing with two eyes. A vertical viewing angle is also taken into account. The horizontal bars climbing the structural column, albeit somewhat schematic, are supposed to reconstruct the facade of haussmannian apartment block of the Paris plans.