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. 2022 Feb 9;22(4):1307. doi: 10.3390/s22041307

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© 2022 by the author.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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VE training spaces: (a) an empty squre room; (b) a squre room with one object attached to wall, and second located far from the wall; (c) a squre room with three objects in different sizes attached to the wall, and one more located far from the wall; (d) a rectangle room with two objects in different sizes attached to the wall, and one more located in rooms’ center; (e) a rectangle room with three objects attached to the wall, and one more located in rooms’ center; (f) a “L” shape space with three objects: a door, one object attached to the wall, and one more located in spaces’ center; (g) a “T” shape space with five objects: a door and four objects in different sizes attached to the wall; and (h) a squre space devided to three rooms with a corridoe in “T” shape with a door and seven objects in different sizes and locations.