The initial technical task for this women's clothing store was simple and banal – it was just necessary to replace the existing track lamps with new ones. During the 3d modelling, I noticed that the track system did not hang quite correctly, it was located strictly above the mannequins, and if they moved it a little forward, the illumination would be better. So, I carried out calculations with the old location of the track system and with the new one in order to convince the customer to install it in a new position.