What cultural influence did Raj Singh embrace during his reign in Kishangarh which influenced the themes of paintings produced in the region?

Pushtimargiya cult of Vallabhacharya

Answer: Pushtimargiya cult of Vallabhacharya
Raj Singh, during his reign in Kishangarh, embraced the Pushtimargiya cult of Vallabhacharya.

Kishan Singh, one of the sons of the king of Jodhpur, founded the state of Kishangarh in 1609. By the mid–seventeenth century under the patronage of Man Singh (1658–1706), artists were already working in the Kishangarh court. A distinctive style of the state with a general tendency to elongate the human form, making lavish use of green and penchant for depicting panoramic landscapes had evolved by the early eighteenth century during the reign of Raj Singh (1706–1748). With Raj Singh getting initiated into the Pushtimargiya cult of Vallabhacharya, Krishna Lila themes became personal favourites for the rulers of Kishangarh and represented a major portion of their court art.