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Help > Building a 3D Model > The Objects That Make Up A Model > Bent Tubes > Bent Tube Troubleshooting > Issue: Bent Tube Mark has loops or strange end shape, or the end Width line is incorrect
Issue: Bent Tube Mark has loops or strange end shape, or the end Width line is incorrect

How to detect: In a photo the mark curve (the main edge) may have strange shape, or loops. In addition if this strange curve shape happens near a width point (and the connecting line), the width point can be misplaced (width points should be perpendicular to the attached edge point.

How to solve: Insert more Bent Tube edge points into the curve to ensure the straight or bend sections are defined well. Then drag the edge points until the curve behaves.