CurveSlice Pro Documentation

Version 2.0 — Interactive curve cutting for Blender 4.0+

Getting Started

Installation

1. Download curveslice_pro.zip from GitHub or Blender Market
2. In Blender: Edit → Preferences → Add-ons → Install
3. Select the zip file and click Install Add-on
4. Enable CurveSlice Pro by checking the checkbox
5. The CurveSlice panel appears in the 3D Viewport sidebar (press N)

Your First Cut

1. Add or select a mesh object in your scene
2. In the CurveSlice panel, set your mesh as the Cut Target
3. Click Draw Cut Curve or press Ctrl+Shift+X
4. Click to place points across your mesh — a red overlay shows what will be removed
5. Press Enter to cut

That's it. The mesh is trimmed along your curve.

Keyboard Shortcuts

Cut Modes

Select your cut mode from the buttons in the panel before drawing.

Curve Types

Straight Segments

The default. Each click places a point connected by a straight line to the previous point. Fast and precise for hard-surface cuts.

Bezier Segments

Press Alt while drawing to toggle to Bezier mode. Points are connected by smooth curves with automatically computed handles. The preview shows the exact curve shape in real-time — what you see is what you cut.

All Bezier handles update dynamically as you move your mouse, including when closing a loop. The final cut matches the preview exactly.

Closed Loop Cuts

Closed loops let you punch holes, extract regions, or slice shapes out of your mesh.

1. Place at least 3 points
2. Move your mouse near the first point — a green dot appears when you're close enough
3. Click to close the loop and execute the cut

When hovering near the close point, the entire curve preview recalculates to show the true cyclic shape — all Bezier handles update to reflect the closed loop.

Closed loops work differently depending on your cut mode and the Flip Cut Side setting:

• Trim (inward): Punches a hole in the mesh. The red fill shows the interior being removed.
• Trim (outward): Keeps only the interior. The red fill shows everything outside being removed.
• Slice: Creates two separate objects — the interior piece and the exterior piece.
• Intersect: Keeps only the geometry inside the loop.

Cut Settings

Cut Through

Enabled by default. The cut extends fully through the mesh regardless of its thickness. This is what you want for most cuts.

Custom Depth

Disable Cut Through to reveal depth controls for partial cuts:

• Depth: How far the cutting wall extends through the object along the view direction
• Depth Offset: Shifts the starting point of the cut forward or back along the view direction

Flip Cut Side

Toggles which side of the curve is removed. You can click the button in the panel or press F during drawing. The red overlay updates in real-time so you always see what will be removed before committing.

Remeshing

Requires Indie or Pro license. All remesh features are available during the 7-day free trial.

Boolean cuts can create messy topology. CurveSlice Pro includes built-in remeshing to automatically clean up your mesh after every cut.

Enable Remesh After Cut in the Remesh panel, then choose your method:

QuadriFlow Settings

• Ratio / Faces: Target the remesh by ratio of original faces or an exact face count
• Use Mesh Symmetry: Preserve symmetry during remeshing
• Preserve Sharp: Keep sharp edges intact
• Preserve Mesh Boundary: Don't move boundary edges
• Preserve Paint Mask: Maintain sculpt paint masks
• Smooth Normals: Smooth normals after remeshing
• Seed: Random seed for reproducible results

Mesh Statistics

The Remesh panel shows the active mesh's face count and vertex count. Quick-toggle buttons for viewport Statistics and Face Orientation overlays are provided so you don't need to hunt through Blender's overlay menus.

Use the Remesh Now button to remesh at any time without performing a cut.

Edit & Sculpt Mode

Edit Mode (Indie+): Start the draw tool while in Edit Mode. CurveSlice handles all mode transitions automatically — you draw, cut, and return to Edit Mode seamlessly.

Sculpt Mode (Pro): Start the draw tool while sculpting. After the cut completes, you're returned to Sculpt Mode automatically. This is ideal for iterative sculpt-and-cut workflows similar to ZBrush's trim brushes.

Post-Cut Options

• Keep Curve: When enabled, the projected curve mesh is retained in the scene after cutting. Useful for reference or further editing.
• Apply Cut Materials: Colors the cut surfaces with random materials so you can easily identify which faces were created by the boolean operation.

Licensing

Free Trial

All features — including Edit Mode, Sculpt Mode, and all remesh options — are fully unlocked for 7 days after first install. This lets you evaluate everything before purchasing.

After the trial, the free tier allows 3 cuts per day with basic features (Trim, Slice, Intersect, Bezier curves, closed loops, and live preview).

Activating a License

1. Purchase a license at curveslice.jacobsiler.com
2. You'll receive a license key by email
3. In Blender, open the CurveSlice panel → License section
4. Paste your key and click Activate License

License Tiers

Deactivating

Click Deactivate License in the License panel to free up a device slot — for example, when moving to a new computer.

Troubleshooting

"No cut target set"

Select a mesh object in the Cut Target field before drawing.

"Cut target is hidden"

Unhide the target mesh in the Outliner (click the eye icon) or press Alt+H in the viewport.

QuadriFlow says "Remeshing canceled"

The mesh is likely not manifold — it may have holes, loose edges, or inconsistent normals. Try running a Voxel Remesh first to make the mesh manifold, then use QuadriFlow on the clean result.

Cut produces unexpected results

Try flipping the cut side with F during drawing. For closed loops, check whether the red overlay shows inward or outward removal.

Boolean operation fails

Blender's Exact boolean solver requires clean geometry. Ensure the target mesh has no overlapping faces, zero-area polygons, or non-manifold edges. Running Mesh → Clean Up → Merge by Distance in Edit Mode can help.

Remesh Now button is greyed out

Make sure a mesh object is selected or set as the Cut Target.

Support

Email: dev@jacobsiler.com
Website: curveslice.jacobsiler.com
GitHub: github.com/JacobDSiler/CurveSlice-Pro

CurveSlice Pro v2.0 — Made by Jacob Siler