Each stable release of SheepMetal is listed below, newest first. These notes describe what changed for you as a user — no setup required, just update the plugin to get the latest version.
1.2.2 (2026-10-08)#
Improvements#
- corner relief planning scales across threads
1.2.1 (2026-10-08)#
Bug Fixes#
- unroll: part numbers cut into a flange no longer flag the flat as self-intersecting
Improvements#
- faster hems and unrolling
1.2.0 (2026-10-07)#
Features#
- cli: add FlatCommand for unrolling parts to SVG
- enhance bend direction handling and add regression tests for flat view
1.1.0 (2026-10-07)#
- No changes to components.
1.0.1 (2026-10-06)#
Bug Fixes#
- the Package Manager link opens the What's New page
1.0.0 (2026-10-05)#
The first stable release, replacing 0.9.9.
⚠ BREAKING CHANGES#
- Bend Correction Table: new Flange Measure input. New components use DIN 6935; upgraded ones use Virtual Sharp, so their flats do not change.
- Tables: an angle outside a K-factor or correction table stops the unroll with an error. Tables have no fallback K by default.
- K-Factor Table: an angle listed twice is an error. Remove the extra row.
- Hems: closed hems develop from a hem allowance (default 2.793 × thickness), so their flats are 0.3 % to 2.4 % longer than in 0.9.9.
- Corner reliefs: Unjoin Edges is gone from Non-Manifold To Sheet. Wire in Corner Relief Options and draw those edges as Seams.
- Tolerances follow the Rhino document. Set Tolerances applies only while its document is open.
- Degrees: angle outputs and the Set Tolerances input are in degrees. Upgrade Components converts typed-in values.
Features#
- Unroll: new engine, about 8 times faster. A face that cannot be unrolled stops with an error that names it. New Orient, Reference 3D and Target Frame inputs, and Finish Up and Finish Down outputs.
- Corner reliefs: wire Corner Relief Options into Non-Manifold To Sheet for a square relief at every corner, with Seams, Auto Seams, Overlaps, Margin, Seam Gap and Corner Radius.
- Hem Allowance: new component. Enter the allowance you measured on your press brake.
- Nesting: new Nest Parts and Sheet Stock nest flat patterns by their true outline.
- Sheet Properties: material, quantity, name, part number, finish and grain, kept through transforms and saves.
- Grain: By Grain mode on Display Sheet, Respect Grain on Nest Parts, and textures that follow the bends.
- Unroll Mapper and Reroll map geometry between the 3D part and the flat.
- Rhino 9: the Rhino 8 package includes a .NET 8 build for Rhino 8.20+ and Rhino 9.
Bug Fixes#
- Conversion: solids with split bend surfaces and some broken imports now convert, and an explicit root face stays the same face on them.
- Bend Correction Table: DIN 6935 tables (Jorns, HiCAD) no longer develop bends over 90° too long. Set Flange Measure to DIN 6935.
- Bend radius: shallow bends and split bend faces no longer get the wrong radius.
- Non-Manifold To Sheet: thickness and bend radius are used exactly as given, no longer rounded.
- Reroll: cutouts across a bend whose radius is small for the thickness no longer fail.
- Sheet Info: a hole in or across a bend counts as non-isolated.
- Lists: an empty item no longer shifts every later result by one.
- Upgrade Components keeps internalised Breps, curves, sheets and data trees.
- Manifold To Sheet: Merge Coplanar Faces works, and the input Brep is no longer flipped or merged.
0.9.9#
Features#
- Bend Correction Table: new compensation strategy. Looks up a correction from thickness, inner radius and angle; flat length = sum of flange lengths + correction. Nearest match on thickness and radius, linear on angle.
0.9.8#
Improvements#
- Faster classification, most noticeable on large parts.
- More robust overall.
0.9.7#
Bug Fixes#
- More robust tolerance handling.
0.9.6#
Bug Fixes#
- More robust hem handling in edge cases.
0.9.5#
Features#
- Experimental Sheet To Non-Manifold and Sheet Editor components.
Bug Fixes#
- Fixed lookup tables for K-factor strategies.
0.9.3#
Bug Fixes#
- Bend direction detection is more robust in edge cases.
- Correct trims for angled hems.
0.9.1#
Bug Fixes#
- Unroll: null inputs keep the tree structure and return null in place.
0.9.0#
Features#
- New corner relief options.
- Faster edge relief processing.
Improvements#
- Faster classification.
Bug Fixes#
- Sheet Info: null inputs no longer return wrong trees.
0.8.0#
Changes#
- Default setback changed from 1 to 0.5 × thickness.
- The extension of inner bend relief cuts is now a fixed value.
Improvements#
- Faster relief cut detection and creation.
Bug Fixes#
- Hems work again in Rhino 8.27+.
- Relief cuts are created correctly on some complex parts.
- 180° hems give the same result on Mac and Windows.
0.7.4#
Bug Fixes#
- Flat parts allow a small angle tolerance for minor inaccuracies.
0.7.3#
Improvements#
- More stable bend detection for angles near 0° or 180°.
- Invalid sheets now always raise an error.
0.7.2#
Bug Fixes#
- Two faces joined by more than one edge are handled correctly.
- Fewer fillet failures during relief cut creation.
0.7.1#
Improvements#
- The Sheet parameter supports transforms.
- One tolerance system shared by all components.
- Faster Brep To Sheet components.
- Error codes for easier troubleshooting.
Bug Fixes#
- Non-Manifold To Sheet no longer fails when switching from parallel to single-threaded.
- More reliable edge detection on complex parts.
- Unroll no longer sets the bend radius to 0.
0.7.0#
Features#
- Flange: offset on both sides and taper.
- Unroll: new Back Side Up input.
Bug Fixes#
- More reliable hem detection.
0.6.2.3#
Bug Fixes#
- Non-Manifold To Sheet: the bend direction flip works in Rhino 7.
0.6.2#
Changes#
- New bend detection: more accurate and faster. Results may change for some parts.
0.6.1.0#
Bug Fixes#
- Flat relief cuts.
Improvements#
- Non-Manifold To Sheet rebuilds from the root face for consistent results.
- Faster Non-Manifold To Sheet and Manifold To Sheet.
0.6.0.1#
Bug Fixes#
- Joining Breps retries with larger tolerances, so complex parts join more often.
0.6.0.0#
⚠ BREAKING CHANGES#
- Non-Manifold To Sheet: the root face defaults to the first face, not the largest.
- Manifold To Sheet: no longer picks the largest face as root. Set the root face explicitly.
- Non-Manifold To Sheet: Flip Normals is renamed Flip Offset.
Features#
- Non-Manifold To Sheet: new Flip Bend Direction input.
- New Tolerance component for headless Rhino.
- New SM Changelog component that shows the installed version's notes.
Bug Fixes#
- Adjusted the depth of inner bend relief cuts.
- More reliable relief cut detection.
0.5.0#
- Initial release.