If a building or plot is not aligned with the cardinal directions, this indicates a defect known as Vidisha. This defect mixes the places of the deities within the home, and therefore it becomes impossible to determine their exact locations. According to ancient formulas and scriptures, when Vidisha is present, one may plan, design, and apply corrections using mandalas with different divisions (3×3, 5×5, 7×7), but it will not be possible to divide the home into 81 parts (the 9×9 mandala). In any case, it is important that the center of the home – the Brahmasthan – correspond to the shape of the home, along with the surrounding sections. This means that the Brahmasthan cannot be oriented to the cardinal directions if the house itself is not aligned with the cardinal directions.
Vastu Shastra is a science that is based, among other things, on symmetry. This symmetry allows corrections to be applied properly. In principle, when Vidisha is present, one uses the 3×3 mandala, which consists of only 9 parts.
Ideally, the deities in the Vastu Purusha Mandala are divided into four layers of padas: the central Brahmasthan, surrounded by the Devata layer (divine beings), surrounded by the Manushya layer (human-like deities), surrounded by the outer Pishachya layer, consisting of 32 demonic deities.
The mandala divided into 81 parts has several variations. For example, unlike the mandala shown before you, there is an additional variation that includes 32 outer deities occupying only one pada each.
When preparing to renovate or apply corrections in a house not aligned with the cardinal directions, it is important to determine by how many degrees the house is tilted. Even if the tilt is less than 20 degrees, the exact positions of all directions must be checked. For this reason, one marks the locations of the deities (those that can be identified), the location of Brahma Bindu, the four padas surrounding the Brahma Pada (these must shift slightly in the direction of the tilt), and the 32 outer padas.
It is also necessary to correctly determine the positions of the deities Soma, Yama, Varuna, Shikhi, Anila, Pitra, and Rog by drawing a line from east to west (Brahma Sutra – that is, Surya, the Sun, life) and a line from north to south (Yama Sutra – death, as Yama is the god of death), as well as two additional diagonal lines: one from northeast to southwest, and the other from northwest to southeast (the corner deities). In this way, we can perform the most important corrections and improve the present condition.
When a house is in a Vidisha position, this also affects the elements – water, fire, air, and earth. This causes them to no longer function as they should from their proper corners, because those corners effectively no longer exist. Anything that disturbs the elements causes them to function incorrectly, which in fact is itself a dosha. A home (or apartment) with a 45-degree tilt is completely unsuitable for living. Such buildings are suitable only for business and trade.
Passages Beneath Buildings
Under many buildings in the world there are various kinds of passages – some for cars and some for people entering the building. In any case, according to Vastu, this is not a favorable condition. Because of movement beneath apartments that are, in essence, not connected to the ground, the disappearance of positive energies and stability may occur. Gates that block movement will not solve the problem. In most cases, nothing can be done. Corrections such as natural stone and strengthening the earth element within the home should help.