photospheres
Photospheres, or 360 photos, are panoramic images that surround the original spot from where the image was captured. They are usually large, wide images and various viewing tools let people "look around" the image, giving them a full, 360 degree perspective.
Equirectangular images are one single stitched image of 360° horizontally and 180° vertically.
a-The following photospheres are taken from flickr's equirectangular group
They are free to download.
To set one of these images as your VR background:
click on your preferred image - it will take you to the Google drive image
download the image to your PC / laptop
upload the image to your repl project
set the image as the source (src) of your "sky" <a-sky src="?????"></sky>
