Plasticity 26.1.3 Mac

Parametric history trees can turn a simple fillet into an hour of backtracking. Plasticity sidesteps that problem with direct editing, letting you push and pull geometry without rebuilding the timeline.

1. Start with watertight booleans

Union, subtract, and intersect operations produce clean, closed solids on the first attempt. The Parasolid kernel handles edge cases that leave other modelers with open seams, so you spend less time patching geometry.

2. Shape surfaces with xNURBS

When a form needs precise curvature, the xNURBS engine gives you patch and sweep tools that hold G2 continuity across multiple boundaries. This is the same class of surfacing found in high-end CAD, tuned for speed.

3. Convert PolySplines on the Studio tier

Studio users can turn dense quad meshes into editable NURBS patches with PolySplines, a bridge between subdivision modeling and production surfaces. The feature also unlocks expanded CAD translation and Export Hidden Line for technical SVG drawings.

Drag in a reference image and the first shape follows

A typical session begins with a blank viewport and a quick decision: sketch a profile, or drop in a primitive. Most users pull a reference image onto a plane first — drag the file straight from Finder, align it, and lock the layer. From there, the Line and Arc tools trace the main silhouette. Dimensions appear live as you draw; tap D and click any segment to set an exact measurement. The geometry snaps tight the moment you confirm the number.

With a closed profile, E extrudes it into a solid. That extrusion is direct — no sketch buried in a feature tree, no double-clicking to edit later. Select a face, push or pull, and the body updates immediately. If the part is symmetrical, a quick Ctrl+J (Duplicate) and Mirror across the centre plane saves modelling half the object. Boolean operations come next: overlap a cylinder with the main body, hit B, choose Subtract, and the cut is watertight on the first go. The Parasolid kernel rarely leaves open edges, so the shelling step that follows — select the top face, run the Shell command, dial in a wall thickness — works without cleanup.

Fillets land last, and that sequence matters. Adding a 2 mm round to the outer rim takes seconds; the live radius slider lets you dial the look before committing. Export wraps the session. Studio users might fire off an SVG hidden-line output for documentation, or write a STEP file for the machine shop. The whole flow, from reference image to closed solid, often clocks under twenty minutes for a straightforward enclosure part.

PolySplines turned mesh data into editable NURBS patches

PolySplines landed in the 2026.1 cycle and immediately shifted how Studio users handle mesh data. Instead of tracing over an imported quad mesh by hand, you convert it into editable NURBS patches in one operation. That alone shrinks a half-day retopology chore into a few clicks, especially on complex organic forms headed for hard-surface detailing.

The Export Hidden Line command, added in the same release, gave technical artists a direct path to clean SVG linework. Previously, you needed a separate drafting tool or a screen-capture workaround for presentation sheets. Now the viewport geometry exports as vector strokes, ready for layout in Affinity Designer or Illustrator with no intermediate raster step.

Under the hood, updates remain manual — the documentation notes that new versions must be downloaded and installed by the user, no auto-update mechanism exists — which keeps working environments stable when a project deadline looms. The 26.1.3 build tightens edge-case handling in fillet previews on certain Apple Silicon configurations, particularly where live dimension feedback could lag on deeply nested boolean chains.

Same Parasolid kernel as Shapr3D, but built for the keyboard

Plasticity borrows the direct-editing philosophy of Shapr3D but swaps the iPad-first workflow for a desktop-native experience. Shapr3D leans on the same Parasolid kernel and offers a polished sketching system tied to Apple Pencil, while Plasticity puts keyboard shortcuts and right-click radial menus at the centre. The surface toolset in Plasticity is deeper, especially with xNURBS blending, whereas Shapr3D keeps surfacing simpler and pushes hard toward manufacturing documentation.

Next to Moment of Inspiration, Plasticity feels faster for solids and booleans. MoI's strength is its stripped-down, pen-tablet-friendly interface and a gentle learning curve; its surface tools stay closer to basic lofting and sweeping. Plasticity adds G2-continuous patch creation and the PolySplines bridge, which gives Studio users a remodelling path that MoI doesn't match. On the other hand, MoI runs on a wider range of older Macs and tends to be lighter on system resources during long sessions.

Fusion 360 covers the full CAD-to-CAM pipeline, but its history timeline is the very thing Plasticity avoids. A parametric model in Fusion is fantastic for iterative engineering changes; it becomes a liability when you need to rapidly sculpt a concept, fillet at will, and never worry about feature-order failures. Many designers run Plasticity for the concept-and-blockout phase, then hand off a STEP file to Fusion only when the form is locked.

Space bar opens a command wheel right under your cursor

• Radial menus under the cursor. Holding Space brings up a command wheel right where the pointer sits. No travel to the toolbar, no memorised hotkey for every single function. The same menu adapts slightly to context — different options appear over a face than over an edge.
• Duplicate with a transform. Ctrl+J copies the selection and immediately starts a move. Tap X, Y, or Z to lock the axis, type a distance, and you get a precise linear array with no dedicated array tool required. Repeat the hotkey and the new offset stacks from the last copy.
• Edge selection loops. Double-click an edge, and Plasticity selects the entire loop if the topology is clean. That makes chamfering an entire rim or deleting a ring of faces a single-gesture task. Hold Shift and double-click to add loop selections across multiple bodies.
• Immediate dimension editing. Tapping D after selecting any face, edge, or feature opens a dimension input floating next to the geometry. The model rebuilds as you type, so a quick D, 12 mm, Enter resizes a boss or pocket without opening a property panel.
• Viewport shading toggles. The V key cycles through shaded, shaded-with-edges, and wireframe modes. Shaded-with-edges is the workhorse for boolean-heavy sessions, where seeing both the solid surface and the edge loops lets you catch tiny misalignments before they propagate.

Plasticity 26.1.3 runs natively on Apple Silicon with interface support for eight languages, including Japanese, German, and Simplified Chinese.

• macOS 10.14 or later
• Apple Silicon Mac