15 °- 75° This orientation is constructed from the vertical vanishing trace (VVT) of the 15° orientation. (The VVT is the same construction as the 0° - 90° or measuring point method, but turned vertically.) Rotate the SP -15° line to a vertical position. (The use of the VVT is possible in other views as well but is usually not practical for any but the 0° and 15° and sometimes 30° planes. This is because the VVT usually falls off the drawing surface.) Draw the 30" vertical line and draw lines to the 15° VP. Use the 75° grid lines to approximate the 75° VP. Depth is measured by the VVT. The face of the 75°-15° cube approximates a square. It is checked by the 30° and 60° diagonals. Vertical Vanishing Trace The VVT. can be IIsed in any oriellIafion bill ifS pracficaillse is limifed to fhe 75°_15° orielllafioll. Somefimes fhe 30° VVT. can be IIsed for fhe 60°-30° oriemarion bllf normally fhe VVT. falls olliside fhe drawing sllrface. Fromal Formal Seuing 15 °-75 ° Thisfronlal seuing for The Dining Room and fhe proscenillm are sholl'nI5°-75° to fhe picfllre plane. Mlllfiple Axes in Eleven Poinf Perspective Alfhollgh imended as a qllick skefch system, eleven poilll perspective is sllfficiemlyflexible to accommodare fhe mlllfiple axes in fhis serring of Cyrano de Further Implications of This System The inclusion of the 15°-75° orientation in the range of standard views is an advantage of this system. It is especially useful for the modern theatre because it can show 15° raked box settings as well as a pleasing off-center view of frontal formal settings. This 15°-75° view is usually neglected because the 75° VP is difficult to plot. The use of the 75° grid makes this view easy to construct in freehand as well as measured perspective. This system may appear to be rigid because only four constructions are used. In practice, however, it allows rapid and accurate construction of twenty-four orientations. Walls are even more easily constructed than small objects such as furniture, because only one plane, not three, is plotted. The use of these vanishing points need not restrict the designer. Special vanishing points are easily Jetermined because the station point is on the board (rotated above the plan at the horizon) and is easily available for plotting special orientations. When special orientations are plotted, the depth is derived from the 0°-90° view. However, only the eleven points of this system are needed in most design sketching. The use of additional VPs actually defeats the simplicity of this system. Currently the computer is being considered by designers as a tool to replace perspective grids and "lineaids" as solutions to graphic representation of modern settings. But the utilization of highly complex tools should be considered carefully. The directness of drawing can be preserved with a simple system such as eleven-point perspective. 0 Tim Palkovic is an Associate Professor of Theatre at the State University of ew York at Plattsburgh. His article on Cylindrical Perspective appeared in the Summer 1981 issue of TD& T. Bergerac. SITT / Fall 1984/Theatre Design & Technology II