What are Blue sky and virtual renovation?

They're two AI photo edits, and both are labelled because they change the photo.

• ✓Blue sky replaces a grey or washed-out sky with a blue one. Only the sky changes. It's labelled “Virtual sky” and uses 1 credit, and the review holds back any result where the house, lawn, trees or power lines changed.
• ✓Virtual renovation shows a room with new finishes you pick, such as paint, flooring, cabinets or countertops, beside the current photo. It's labelled “Renovation concept, not current condition” and uses 2 credits. It's kept out of your MLS® photos, flyer, videos and posts, and shows in a “Renovation ideas” section on your listing website.