Decorative Box
11 views015
RIG: Real Implicit Geometry
Free your creativity.
Rig Cad brings real-time implicit modeling to the browser. Shape smooth SDF blends, organic forms, and field-driven detail, combine them with crisp triangle meshes in one parametric tree, and export print-ready geometry.
Free for personal use · No installation required · Offline-friendly saves and convenient cloud storage
Live parametersShader driven
Popular models
Featured projects
Latest articles
Weak Across Layers: How Much, and What Moves It
Printed parts are weaker across layers. Folklore says by half; tests say a tenth to nine tenths. What a bond is, what moves it, and a coupon to measure it.
layer adhesionprint orientationanisotropy
How Far Can a 3D Printer Bridge?
Vendor guides say 5 mm, torture tests say 100. What a bridging strand is doing, why slower is not safer, and the coupon that measures your machine's limit.
bridgingbridges3d printing
How Much Clearance Does a Printed Thread Need?
A printed thread comes out tight, and how tight depends on which way up it was printed. Why pitch limits printability, and the coupon that settles it.
threadsclearanceprint orientation
Designing a Cam and Follower That Prints
A cam turns rotation into motion you draw. Motion laws, the 30° pressure-angle limit, and a grooved cam and follower that prints without supports.
cam and followermotion lawsmechanisms
Real Implicit Geometry, explained
Model as a field. Finish as a mesh.
Implicit modeling defines shape as a continuous field instead of only a boundary mesh. That makes smooth blends, organic forms, offsets, shells, and procedural detail natural to build. In Rig Cad, SDF results share one parametric tree with watertight Manifold mesh operations, so you can choose the right representation at every step.
Implicit + mesh workflow
Blend continuously. Cut precisely.
Build soft transitions and field-driven detail with SDFs, then continue with watertight Manifold mesh booleans for crisp cuts and reliable export — inside one editable tree.
Open projectShowcase project by @p12
Visual parametric workflow
Edit the CSG tree visually
See every CSG component in the tree and edit it visually — then evaluate as mesh or SDF depending on whether you need sharp features or soft blends.
Open projectShowcase project by @p12
Personalized 3D printing
Personalize products, ready to print
Parametric projects can produce personalized, 3D-printable products. Configure the exposed options and generate a tailored, print-ready result in seconds.
Open projectShowcase project by @p12
Implicit modeling and beyond
A hybrid geometry toolkit
Start with fields, finish with precise solids, and keep every representation together.
- Solid CSGBooleans and watertight meshes in one project tree.
- Implicit SDFBlend, offset, shell, and combine shapes as continuous distance fields.
- NURBS surfacesExact curves and solids when precision matters.
- VoxelsSculpt sparse volumes and convert in the same project.
- 2D sketchConstrained sketches that drive parametric 3D.
- Fields & patternsDrive forms with Voronoi, metaballs, lithophanes, and heightmaps.
- PluginsSave any subtree as a reusable parametric component.
- Share & embedPublic models, configurators, articles, and embeds.
Frequently asked questions
- What does “RIG” in Rig Cad stand for?
- RIG stands for “Real Implicit Geometry.” It reflects Rig Cad’s core workflow: use signed distance fields (SDFs) to model smooth blends, organic forms, offsets, shells, and field-driven detail, then combine them with crisp mesh and solid operations in the same parametric project.
- How is Rig Cad different from FreeCAD, OpenSCAD, or Onshape?
- Rig Cad runs fully in the browser with multiple geometry kernels in one parametric project tree—solids, surfaces, meshes, and implicit SDF—plus shareable configurators and print-ready export without installing desktop software. Unlike tools locked to a single representation, the same CSG tree can be evaluated as mesh or SDF, so smooth blends and hard booleans live in one parametric model.
- Can one project mix solids, surfaces, SDF, and voxels?
- Yes. Different subtrees can use solid CSG, NURBS, implicit fields, or voxels in the same scene graph, connected through parameters and a shared workspace.
- Can someone customize a design without learning CAD?
- Yes. Owners expose selected parameters so visitors open a configurator, change the options, and generate a tailored model. Visibility, forking, and download permissions stay under owner control.
- Does Rig Cad require installation? Do my files work offline?
- No install is required—Rig Cad runs in a modern browser with WebGL. Projects save locally in the browser and sync to the cloud when you are online, so you can reopen recent work offline.
- What formats can I export for printing or CAD exchange?
- Common print and mesh formats include STL, 3MF, OBJ, glTF/GLB, and PLY; 2D workflows use DXF and SVG.
- Is Rig Cad free to use?
- Yes. You can start free in the browser. Upgrade when you need more private projects, storage, collaboration, or higher compute limits—see plans for current free and paid tiers.
Export for the next step: STL and 3MF for printing; OBJ, glTF/GLB, and PLY for mesh interchange; DXF and SVG for 2D.
Ready to make something?
Turn your next idea into real geometry.
Start with implicit forms, refine with precise CAD tools, and export a model ready to use.