So, for the second one, it's likely aliasing.
Afaict the Mars Pro (I have a Mars 2 Pro, so not sure about the details of yours) seems to have a X/Y pixel size of 47.25um
Now, for example, if you print at a a layer height of 50um and at an angle of 45° you'd see such a horizontal line every 18 layers because it moves up for 50um and to the side for 47.25um. Eventually this difference of 2.75um will add up to a full pixel of 47.25um and there will be a layer where it moves 2 pixels to the side. That would be visible in the print afterwards.
Some slicers (sorry, I haven't ever used Chitubox as it fails to render the model on my GPU and neither Elegoo nor Chitu seems to reply to my requests regarding this) support antialiasing which may or may not help with this (ymmv).
You can, however, fiddle with layer height and rotation. Try to rotate the print to an angle where it would match with the pixel size. I.e, if you print 45°, use a layer height of 47.25um.
Afaict the Mars Pro (I have a Mars 2 Pro, so not sure about the details of yours) seems to have a X/Y pixel size of 47.25um
Now, for example, if you print at a a layer height of 50um and at an angle of 45° you'd see such a horizontal line every 18 layers because it moves up for 50um and to the side for 47.25um. Eventually this difference of 2.75um will add up to a full pixel of 47.25um and there will be a layer where it moves 2 pixels to the side. That would be visible in the print afterwards.
Some slicers (sorry, I haven't ever used Chitubox as it fails to render the model on my GPU and neither Elegoo nor Chitu seems to reply to my requests regarding this) support antialiasing which may or may not help with this (ymmv).
You can, however, fiddle with layer height and rotation. Try to rotate the print to an angle where it would match with the pixel size. I.e, if you print 45°, use a layer height of 47.25um.