
Here the narrow space created by the installation is visible. The transparent screen which is in gray here will be reverse projected on to. The hd projector produces 2000 lumens, or approximately 121 lux on the 17 square meter area on the projector (exterior to the space) side of the screen. Assuming 50% of the lumens pass through the screen, the lux on the interior of the space is 60. This reduction in lux will be created and modulated through use of materials for the reverse projection screen,
The goal of the installation is to be immersive. One of the characteristics of immersive installations working with light, is the absence of shadows projected by the user, except beneath themselves. Because the light in this installation is entering from the side, which is unusual for light in a space. The human brain is used to light coming from above, and as such in order for this space to be percieved as immersive - filling in shadows that viewers will create on the back wall is important.
So then the lighting on the back wall must have at least as much lux as the lighting coming through the screen. Calculations for the LED strips from superbrightleds.com are more complex and for the purposes of this piece, make more assumptions. Each LED on the strips produces 2 lumens, and there are 150 LEDs across the 16.4 feet of linear space in the installation. This produces 300 lumens, or approximately 18 lux across the entire back wall of the installation. However, because the LEDs will be installed in a wall washer fixture, this lux will be brightest at the top of the wall, and dimmest at the bottom, filling in most of the shadow created but letting the silouhette of the viewer appear at the bottom of the space.

Other issues considered in the layout and construction of the piece.
1) The presence of the small column in the corner, breaking up the space slightly.
This will be compensated for in the frame of the screen - the width of the 2X4s needed to construct the screen will use up that extra space and not cast the projection or light into the end cap of the space. Additionally the camera will be aimed in such a way that this end space will not be visible in the projected image.

2) Camera vision
How high does the camera need to be in order to see 17' of linear space? The projected image can be stretched in such a way that the angle of view is not an issue for the projection, but it is important that almost all of the space is in view of the camera.

3) Aspect ratio and height
The size of the space is dictated by the concept, or the idea of the fuzzy line between being present and absent in a virtual space, beyond the screen, behind the wall of the installation. Because the wall in the studio is 10' a 16:9 aspect ratio demands a 17'10'' installation, a 4:3 aspect ratio demands a 13'4'' installation. In order to achieve these dimensions with at 2:1 lens (as is the lens in the projector I will be using) - it will need to be the full 32' across the room from the installation.




