Washboard_decompose_improper_wing.7z

Update your 7-Zip to the latest version.

Usually refers to "decomposing" or breaking down complex geometry (the "Washboard" or "Improper Wing" components) into usable sub-meshes.

This is often caused by poor vertex normals or overlapping faces. In Edit Mode, press P > Separate by Loose Parts .

Check if the "Decompose" step separated vertices that should be merged. Use Merge by Distance .

Look for the "Washboard" effect (jagged, unintended ridging on the surface).