wavy render!

[a35i]

Hello guys, yesterday i started a render then i had to shut the PC down, so i saved a CXR file to resume my render on the next day, Today i resumed my render and something weird just happened, My render became full of waves all around the image!
and i would like to know the reason!, Thank you.

[romullus]

If you saved the scene before closing it and you're sure that no changes were made before rendering and closing the scene, then it could be that you've encountered some kind of bug. In that case it would be best if you could upload the scene and the CXR file for support team to investigate. You can do this with Corona private uploader https://corona-renderer.com/upload and don't forget to leave the file name here, so the team could track the issue.