Easy Seam Sharp

Draw UV seams and sharp edges in clean, straight lines

Easy Seam Sharp turns edge marking into a quick "hover, preview, click" workflow. Move your cursor over the mesh and a straight vertical, horizontal or ring line is previewed under it. Click, and the line is marked as UV seams or sharp edges. No more selecting edge loops one by one.

FEATURES

Live line preview: see the exact line before you apply it, highlighted even through surface geometry.

Three actions: Mark Seam, Mark Sharp, or Clear S/S (removes seams and sharp edges along the line).

Four direction modes: Auto switches between vertical and horizontal by following your mouse movement. Vertical draws straight up/down lines. Horizontal draws lines that wrap around the model. Ring detects the direction of limbs, wrists, ankles, neck etc. and draws a ring perpendicular to it.

Stop at existing seams: new lines end where they meet a seam instead of crossing it.

Zigzag bridging: when a horizontal or ring line goes all the way around but its ends don't meet, a short zigzag closes the gap.

Mirror drawing: draw on one side and get the symmetric line on the other (X, Y or Z axis).

Reference options: use World Z for upright characters, or Current View to follow your screen up/right.

Straightness tolerance: control how strictly the line follows the target direction.

Session undo/redo: Ctrl+Z / Ctrl+Shift+Z while drawing.

HOW TO USE

1. Select a mesh and open the sidebar (N) > Easy SS.

2. Choose an action (Mark Seam / Mark Sharp / Clear S/S) and a line direction.

3. Click Start Draw, hover over the model to preview the line, then left-click to apply.

4. Press Esc or right-click to exit.

Works from Object Mode or Edit Mode. It switches to Edit Mode automatically and returns to Object Mode when you finish.

SHORTCUTS WHILE DRAWING

LMB: draw the previewed line

V / H / R / A: Vertical / Horizontal / Ring / Auto

M: toggle Mirror

Ctrl+Z / Ctrl+Shift+Z: undo / redo

Esc or RMB: exit

Viewport navigation (orbit, pan, zoom) works as normal while drawing.

REQUIREMENTS

Blender 5.2.2 or newer.