What to test
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Check that Layer 1 / Layer 2 / Layer 3 are visible as separate 3mm boards from angled and side views.
Check that the front wood frame comes from the supplied Layer 3 image, not from a separate fixed bezel model.
Check that Layer 2 / Layer 3 side-wall supports follow their visible PNG alpha boundaries.
Check the dark MDF side material on each support and the visible layer seams.
Check that the back magnet is thinner than the wood layers.