OCULAR RECTIFICATION: Another instance where one might manipulate the size of profiles concerns the position of moldings relative to the eye. These revisions, known as OCULAR RECTIFICATIONS, are intended to restore the profile to its normal appearance by counteracting distortions inherent in human perception. These distortions may be caused by such variables as the vantage point of the observer, available lighting, even the color of the moldings. The issue of perspective is especially critical on the interior, where one rarely can stand as far back from a vertical surface as on the exterior. To illustrate, in fig. 11 if the profile stands roughly level with the eye, you would probably construct the various moldings according to regular geometry (center). But if this same sequence of profiles is to be located near the floor, you might make adjustments because the viewer will always be looking down on it.
For instance, you could re-configure the SCOTIA so more of it is visible, and less is concealed by the overhanging element. The face of the FILLETS may also be turned, and even the half-round could be given an egg-like contour to restore some of its underside to view (left).
[architectural moldings? ... thousands online with downloadable CAD files.]
[via Traditional Building Magazine]
