The inner side of Shree Yantra must be hollow and must have similar geometry like outer side. It must be hollow from top to bottom on inner side which is really difficult to produce. Inner hollowness is essential to attract universal cosmic energy. The energy level of anything kept within such Shree Yantra increases in multiple. Due to lack of production technique, people have made solid Shree Yantra. It is not Yantra but an idol of Shree Yantra shape. A yantra should never be solid from inside.
The outer side of Shree Yantra
