For images, Sphere compatible image file formats are ".jpeg" and ".png".
In terms of size:
- For photo panoramas (360 Photo), we recommend the resolution 8192px x 4096px.
- For normal photos (2D Photo), it depends on your images. However, it is better not to exceed 512px and avoid images with transparency for better fluidity.
When using images or pictograms with a transparent background, trim the image as much as possible to avoid a transparent background that is too wide.
For more information on file formats, you can view the link below: