Move it earlier in the sentence and add specificity: change 'decorated with small white snowflake patterns and a painted blue vintage truck carrying wrapped presents on its roof' to something like 'featuring a large hand-painted blue vintage truck loaded with wrapped presents as the central design, with small white snowflake accents around it.' You could also tighten the camera line to 'extreme close-up macro shot focused on the teacup's painted scene' so the depth of field pulls even more attention to that illustration.

Swap 'festive holiday atmosphere' for something like 'gentle spring morning atmosphere,' and replace the teacup decoration phrase 'small white snowflake patterns and a painted blue vintage truck carrying wrapped presents on its roof' with 'small painted pink cherry blossoms and a delicate gold trim.' You'd also want to change 'soft ivory chunky knit fabric with embroidered white star patterns' to something like 'soft pastel linen fabric with embroidered floral patterns' so the setting matches the new season.

Keep the core structure fixed ('Close-up cozy lifestyle photo of a hand... holding an elegant cream porcelain teacup... shallow depth of field') and just cycle the nail polish color, the teacup's painted scene, and the knit fabric pattern together as a set. For example try 'forest green matte nail polish,' 'painted red vintage sleigh with holly branches,' and 'ivory knit fabric with embroidered pinecone patterns' as one variant, then repeat with different color trios so each image stays cohesive but reads as a distinct entry in the same collection.