Main Panel

• Auto Sharp

  • When this mode is active, edges between different groups become sharp, and edges within the same group become smooth.

• Auto Seam

  • When this mode is active, seams are created on the edges between different groups.

• Display Sharp / Display Seams

  • Toggles the visibility of the overlay for sharp edges and UV seams in the viewport.

• Group By Angle

  • Creates smoothing groups based on the angle between adjacent polygons. If the angle between polygons is less than the specified threshold, they will be placed in the same group. It works on selected polygons, or on the entire object if nothing is selected.
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  • Strict Mode: Toggles 'strict' mode. When active, the 'Group By Angle' operation ignores islands consisting of a single polygon, not assigning them a group.
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• Preview Button

  • In this mode, hovering over a polygon displays its group number. It allows you to interactively select, merge, create new groups, and delete assigned groups.
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• Init from Sharps / Init from Seams

  • Initializes the group creation process based on existing boundaries on the mesh. In 'Auto Sharp' mode, groups will be created from sharp edges, and in 'Auto Seam' mode — from UV seams. This is useful if you haven't used the add-on before and want to continue working on an old model that already has sharps and seams assigned.
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• Copy to Sharps / Copy to Seams

  • Copies the group layout from the currently active mode (Sharp or Seam) to the other. For example, if 'Auto Seam' is active, this button will copy all 'Seam groups' to 'Sharp groups', creating the corresponding sharp edges.
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• Assign RG (Random Group)

  • Assigns a unique smoothing group to the selected polygons. The add-on automatically picks a group number that is not used by adjacent polygons to avoid unwanted merging.
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• Clear

  • Removes the selected polygons from their smoothing groups. If nothing is selected, it clears the groups for all polygons on the object.
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• Island Select

  • In this mode, clicking on a single polygon automatically selects all polygons belonging to the same smoothing group.
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• Select NG (Non-Grouped)

  • Selects all polygons on the object that do not belong to any smoothing group.
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• Select By SG (Smoothing Group)

  • Opens a panel for selecting polygons by group number. This panel only displays buttons for groups that are already assigned on the object.
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Tools Panel

Sharp / Seam Tools

• Sharp Borders / Seam Borders

  • Marks the boundary edges of the current polygon selection as sharp or as a UV Seam. Works in vertex or face selection mode.

• Sharp Selection / Seam Selection

  • Marks all edges related to the current selection (vertices, edges, or faces) as sharp or as a UV seam.

• Unsharp Selection / Unseam Selection

  • Makes all edges related to the current selection smooth (unsharp) or removes the UV seam mark from them.

• Select Sharps / Select Seams

  • Selects all sharp edges or all UV seams on the object. Automatically switches to edge selection mode.
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Utilities

• Shade Smooth Selected

  • Applies smooth shading (Shade Smooth) to the selected polygons.

• Shade Flat Selected

  • Applies flat shading (Shade Flat) to the selected polygons.
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• Selection to Border

  • Converts the current polygon selection into a selection of its boundary edges.
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Pie Menu

For maximum workflow acceleration, all key add-on functions are available in a convenient pie menu. It is called by a hotkey (assigned by the user in Blender's preferences) and provides instant access to the entire toolkit directly under the cursor, eliminating the need to move the mouse to the side panel.