Troubleshooting article about banding

[Ghostkeeper]

I'd like to add a troubleshooting article about banding.

Banding is caused by there being differences in the print process or the model geometry across the Z dimension. This is very generic, so the article would need to list a couple of common occurrences:

• Difference in geometry, e.g. a horizontal surface causing skin, which is solid and prevents shrinkage, while infill allows shrinkage.
• Model splitting into multiple parts, e.g. because of a screw hole.
• Differences in environment, e.g. part of the print was printed at night when it's colder in the room.
• Adaptive layers, different layer heights.
• General periodic change, like the nozzle getting clogged halfway through the print.

To showcase this in a photograph, using Adaptive Layers is probably the easiest.