how can I make instagram carousel with mostly vertical and some horizontal images look cohesive without cropping or ugly borders?
I have 19 professional photographs of artworks from an exhibition.
The photographer deliveredmost in 2:3 portrait (3149×4724) but some of them in 3:2 landscape (4724×3149).
I need to post at least 15 of them as one Instagram carousel without cropping any of the artwork photographs.
I've tried placing the landscape images on a 2:3 canvas with a white-colored background, but the result looks visually awkward once uploaded to Instagram. You can see in the video how it looks with a white background. I also tried black, but neither works well.
I considered leaving the horizontal ones out and posting them separately, but that feels like a bad idea since they're all from the same exhibition.
What would be the professional workflow for making this kind of mixed-orientation carousel look cohesive without cropping the photographs or using obvious borders?
I've even considered using AI to extend the top and bottom of the horizontal images, but I'm not sure if that's the best approach. Please give me your ideas and recommendations.