Hi Megan!
When working with images in Rise, it's a good idea to use images where important details won't be lost if the edges are cropped. Rise 360 content is fully responsive, so your images may have different dimensions as they adapt to different devices and orientations.
We recommend using high-quality images and letting Rise 360 prepare them for web delivery. However, if you'd like an image to keep its specific file format and not undergo compression, you can opt-out of image optimization on a case-by-case basis. Just add _NOPROCESS_ to the name of your image file. It'll upload and display exactly as you saved it.
See more tips on handling images in Rise in the article below:
Let us know if you have questions or need clarification!