Glossy and Matte Bands on the Same Print

Document the failure and confirm that it matches this guide: Alternating shiny and dull bands appear at different heights.

Return extreme overrides to a known printer, nozzle, material, and slicer profile so the diagnosis starts from a stable baseline.

Check speed changes by feature type. Compare slicer speed preview.

Check temperature variation. Review temperature graph.

Inspect cooling variation. Keep cooling transitions controlled.

Rule out volumetric flow limit. Lower peak volumetric demand.

Change only the single setting or hardware condition supported by the evidence, then run a small test that reproduces the original failure.

Compare the test against the target condition, record the successful value, and save it in a printer/material profile before repeating the full print.