Help troubleshooting this image?

[GratefulEd]

New user. Maybe this isn't the appropriate sub, and if so: apologies...and mods, please move?

Do you see the missing pixels in this image, and especially at lower right in the middle of the crescent moon? What are these and how do I eliminate them?




They don't appear in the original (from Designspace):



Edit: I had to do a fresh installation of Mandelbulb this morning because I accidentally cleaned out the program file directory. Perhaps doing so changed a setting I'd modified? Not sure what it would've been.

Thanks in advance...