Plasticity for Mac

Plasticity runs on Macs with Apple Silicon and macOS 10.14 or later. It is a CAD-style modeller built on the Parasolid and xNURBS geometry kernels, made for artists and designers who need precise solids and surfaces without a traditional CAD interface getting in the way.

First moves: a short sequence

1. Start with a simple solid: a block or cylinder. The live dimensions are the first thing to notice — drag a face and the measurements update immediately.
2. Try a boolean operation. Union, subtract and intersect behave predictably, which makes them a safe place to learn the modelling logic.
3. Move to surfaces. Create a loft or sweep, then experiment with XNURBS blending to produce G2-continuous transitions between forms.
4. Push and pull edges and faces while watching the dimension readouts. This is where Plasticity's direct feel becomes clear.

From there, the modelling space opens naturally. Studio users can explore PolySplines in the 2026.1 release, while the manual installation of updates means checking the developer's site for new versions.

A furniture designer's afternoon

Consider a furniture designer working on a lounge chair with a sculpted plywood shell. The brief asks for a form that reads as one continuous surface from armrest to backrest, with soft transitions and no visible seams. In Plasticity, the designer begins by blocking out the seat pan and backrest as separate solids, then uses the bridge surface tool to connect them. The live dimensions let her check the seat height and armrest angle against ergonomic data without opening a separate measurement panel. When the first prototype comes back from the workshop, the shell feels too flat across the lower back — she pulls a control curve outward by 12 mm, watches the XNURBS blend recalculate, and exports a new STEP file the same afternoon.

Between CAD and poly modelling: where the exports travel

Plasticity does not try to replace a full CAD package or a polygon modeller. It fits between them. The STEP and IGES export means a model can travel from Plasticity into Fusion 360 or SolidWorks for detailed engineering, then into Keyshot or Blender for rendering. On macOS, dragging an OBJ or STEP file onto the app icon opens it directly, and the file format support lines up well with Apple's Quick Look — a Plasticity project saved to iCloud appears as a preview in Finder without opening the app. The keyboard shortcuts borrow from the same conventions as Rhino and Fusion, so switching between them during a project feels surprisingly natural.

Alongside other Mac modellers

Three apps tend to appear in the same conversation. Rhino for Mac is the most direct comparison: it offers deeper surfacing tools, Grasshopper for parametric work, and a vastly larger plugin ecosystem. Rhino also feels heavier on the interface, with toolbars that reward patience. Plasticity swaps that for direct editing and a cleaner workspace — useful when the goal is exploring form rather than managing a construction history.

Fusion 360 covers the full product-design chain: parametric solid modelling, assemblies, simulation, CAM and rendering, all inside one application. The trade-off is complexity and a browser-based data model that can feel slow. Plasticity sidesteps both: no cloud saves, no timeline, no file dependencies to resolve. For concept work that will later move into Fusion for production detailing, the two complement each other well.

Shapr3D shares the direct-editing philosophy and a clean interface built for Apple hardware, with Apple Pencil support on iPad. It handles sketching and simple extrusions elegantly. Plasticity goes further on surfacing — XNURBS blending and the PolySplines toolset in Studio reach into territory Shapr3D does not cover, particularly for compound-curvature forms like a car body panel or a medical-device housing.

A workflow: concept to visual output

Here is one path from a loose sketch to a technical SVG drawing, using Plasticity alone for the modelling work.

1. Block out the major volumes. Create primitives — boxes, cylinders, a lofted handle — and position them roughly. Use the live dimensions to set the overall length, width and height to match the design brief.
2. Refine with booleans and fillets. Union the intersecting bodies, subtract cutouts for vent slots or button recesses, then apply fillets. The Parasolid kernel keeps the boolean results watertight, so there is no cleanup step.
3. Add surface transitions. Delete the flat face between two blended forms and bridge them with an XNURBS surface. Adjust the continuity to G2 and watch the zebra-stripe preview confirm a smooth result.
4. Check proportions with live dimensions. Click an edge or a face offset; type a new value. The geometry updates instantly, which makes iterative proportion tweaks fast.
5. Export a hidden-line SVG. Using the Export Hidden Line feature, produce a clean line drawing for the technical sheet. The SVG opens in any vector editor, ready for annotations and dimensions in a layout app.
6. Share the 3D file. Export a STEP file for the engineering team and an OBJ for the visualisation artist. Both formats preserve the fillets and surface transitions intact.

In short: Plasticity handles the creative middle ground — precise enough for production handoff, direct enough for a designer who wants to pull shapes rather than fill parameter tables.

• macOS 10.14 or later
• Apple Silicon
• Interface languages: Russian, English, German, Spanish, Italian, Traditional Chinese, Simplified Chinese, Japanese