Medieval: Back and forth

Made for the Artstation Challenge.
Medieval: Back and Forth-2023. Keyframe Challenge: https://www.artstation.com/challenges/medieval-back-and-forth/categories/168/submissions/76509
Summary:
During the construction of ancient temples in India, around 1200 AD, a remarkable discovery was made. A portal was found that could connect to the future. After a few years, a strong bond was developed between the ancient and future civilizations, aided by the regular use of this portal. The temples themselves were built using advanced technology, which was facilitated by the knowledge and skills gained from their futuristic counterparts.
This newfound connection allowed for regular inter-time travel, where people from the past could travel to the future and vice versa. It became common for important decisions and deals to be made in the future realm, where people from the past were escorted through the portal for discussions and negotiations. The exchange of knowledge and ideas between the two civilizations was incredibly fruitful and led to significant progress in various fields.