chisel
Carve.
DIFFERENCE.
Render.
Compose mathematical shapes — booleans blend like molten metal, every surface is mathematically smooth, and the ray-marched viewport shows the final result as you sculpt.
One stack.
Every boolean.
Chisel booleans run on the distance fields directly, so the result is always a single watertight surface — no mesh repair, no bad normals, no booleans that fall apart at zoom.
Union
Alt + = / NumPad +
Merge two SDF objects into one watertight volume.
Difference
Alt + − / NumPad −
Subtract the target from the active object — the classic cut.
Intersect
Alt + \ / NumPad /
Keep only the volume where both shapes overlap.
Slice
Cut the active object in two and keep both halves as volumes.
Emboss
Raise a stamp out of the host surface, fillets carry through.
Engrave
Recess a stamp into the host surface with rounded inner corners.
Every shape, mathematically exact.
Each primitive is a distance function — infinite resolution, no subdivision setting, no topology debt. New in v4: the Oblong and the editable Ngon. Plus Curve Tube and Curve Revolve when you need to sweep a profile along a Bezier.
Box
Rectangular box with optional edge rounding per profile.
Sphere
A perfect sphere — smooth at any scale, no subdivision.
Oblong
Bevelled vertical edges, rounded caps — box to capsule in one shape.
Ngon
Editable extruded polygon. Drag points, bevel every corner on its own.
Cylinder
Circular cylinder with optional rounding on the rims.
Cone
Frustum from full circle down to a sharp apex.
Capsule
Cylinder with hemispherical caps, hot-dog shape.
Torus
Donut. Major and minor radius, no rounding required.
Prism
N-sided prism (3, 5, 6, 8) with separate bevel and cap.
Trapezoid
Box frustum — pyramid through to box via cap scale.
Pick the curve that matches the look.
Identical fillet shapes across rounding and blending. Hold the Adjust modal and tap 1–5 to swap between them live, on either a primitive edge or a boolean seam.
Smooth math.
Real-time feedback.
Chisel is a tight set of operators built around one idea: model with distance fields and let the renderer show the truth, frame by frame.
Fillets fall out of the math.
Push Blend Radius above zero and the seam between two shapes becomes a smooth fillet — no extra geometry, no weld, just SDF interpolation. Pick the profile that matches the look you want.
Any mesh becomes a distance field.
Point Chisel at a mesh — a scan, a CAD import, a sculpt — and it bakes into a signed-distance grid. From there it is just another primitive: boolean it, blend it, mirror it, array it, emboss it. The grid is cached in the .blend, so reopening the file is instant instead of a re-bake.
Cut with a line you draw.
Switch the tool to Bisect and drag across the viewport: every selected shape is cut by that plane, live. Draw a polyline instead and you get a fence of connected planes with a filletable crease at every corner. F flips the side you keep.
See the final surface as you sculpt.
The renderer is a GPU compute pipeline, and v4 puts a sparse brick volume in front of it: shapes bake incrementally in the background, so only the region you edit re-bakes. Progressive refinement holds your target framerate while you move and climbs to full quality when you stop. F12 renders straight through the camera.
Draw your own polygon.
Not every shape is a box or a cylinder. The Ngon is an extruded polygon you edit right in the viewport — drag the points, click an edge to add one, X to remove one. Every corner carries its own rounding and profile, and they stay clean even where the outline folds back on itself.
Model in math. Sculpt without limits.
Hard-surface, organic, mechanical, abstract — every form lives in the same distance field, and in v4 so does any mesh you bring with you. Smooth where you want smooth, sharp where you want sharp, infinite resolution everywhere.