Introduction

Knife Circle is a powerful Blender add-on for projecting precise circular cuts onto mesh objects with a real-time preview. It features GPU-accelerated rendering, interactive radius control, and works seamlessly in both Object and Edit modes. Perfect for creating clean geometric cuts with accuracy and speed.

Features

What Knife Circle offers?

Interactive Control
Fixed / Freeform Modes
Adjustable Segments
Numeric Input
Quick Shapes
Cut Through
Dual Mode Support
Precision Mode
Snap Mode

Quick Start

How to use Knife Circle?

  1. Select one or more mesh objects
  2. Activate the Circle Knife tool from the toolbar
  3. Click to place the circle center
  4. Move the mouse to adjust radius
  5. Confirm with Left Click or Cancel with Right Click/ESC

Controls

What inputs does Knife Circle respond to?

InputActionDescription
Left ClickConfirmExecute the knife projection
Right Click / ESCCancelExit without changes
Mouse MoveAdjust RadiusDynamic radius control
Scroll UpMore SegmentsIncrease circle smoothness (max 256)
Scroll DownFewer SegmentsDecrease segments (min 3)
Shift + Mouse MovePrecise Mode10x slower radius adjustment
Ctrl + Mouse MoveSnap ModeSnap radius to 5-unit increments
FFixed / Freeform ModeSwitch between fixed/freeform modes
XCut Through ModeSwitch between surface/through modes
TTriangleSet to 3 segments for triangle
SSquareSet to 4 segments for square
CCircleSet to 32 segments for smooth circle
0-9, PeriodNumeric InputType exact radius value
BackspaceDelete DigitRemove last typed character
Enter / Numpad EnterApply ValueConfirm numeric input

Interactive Control

Click to set the circle center, then move the mouse to dynamically adjust the radius with real-time preview.

Interactive control demonstration

Fixed / Freeform Mode

Toggle between Fixed mode (click to set center, move to adjust radius) and Freeform mode (click and drag to define both center and radius simultaneously) using the F key.

Freeform mode demonstration showing click-and-drag to define center and radius

Adjustable Segments

Modify the number of segments on-the-fly using the mouse scroll wheel.

Adjustable segments demonstration

Numeric Input

Type exact radius values for precise cuts. Start the tool, type a value like 75.5, and press Enter to apply.

Numeric input demonstration

Quick Shapes

Instantly switch between common shapes with a single keypress - T for Triangle (3 segments), S for Square (4 segments), C for Circle (32 segments).

Quick shape shortcuts demonstration

Cut Through

Toggle between two modes with the X key - Blue preview cuts only visible front faces, Red preview cuts through the entire mesh.

Cut through mode demonstration

Support

Join our Discord server to stay updated.

Changelogs

Other Addons

Other addons you might like.

Quick BakerMegascans Bridge v2Quick Measure v2Knife CircleQuick DecalQuick InterfaceCamera PreviewQuick ThemeQuick ReplaceBlender to UnityBlender to UnrealBlender to GodotBlender to Game Engine (Unity, Unreal & Godot) Bundle

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We are actively seeking individuals who are passionate about our products and are eager to spread the word. As an affiliate, you'll have the opportunity to earn a commission on sale that comes from your referrals. If this interests you, we'd love to hear from you. Please contact us on Discord to discuss this opportunity further. We look forward to the possibility of welcoming you to our affiliate program.

Discord DM: karan.b3dhub