Choose your version. The browser app is 0.4; Windows remains 0.3. Tools and project formats differ. See version differences.
Browser 0.4 — the current browser workflow is described first. Expand the Windows section for the unchanged installed version.
Connect ordered sections
In Browser 0.4, draw closed sections on separated sketch planes, return to 3D and choose Loft. Click profiles in order. Start and End markers identify the sequence. Use the section rows to reorder, reverse, replace or offset sections. Choose Smooth or Ruled, inspect the exact preview, then Create a new body.
Add guide rails
Choose Guided and select 2–8 open guide paths. Lines, arcs, splines and connected chains are supported. Every rail must meet every section boundary once, in section order. Click Done picking or press Enter to finish selecting rails, then inspect and create. Clicking a rail row lets you replace that reference.
Limits and further editing
Guided loft supports 2–16 separated closed sections without holes. Rails cannot branch, overlap or cross each other; use rails at sharp corners for polygonal sections. Single-rail lofts, manual seams and endpoint tangency are not provided by this builder. A missing guide does not silently produce an unguided result. Edit source sketches to rebuild; use Combine for later Boolean operations on the resulting body.
Windows 0.3 instructions
Sketch Combine results can be used as Loft sections. The solid engine rebuilds Union/Subtract from the retained source shapes, preserving exact curves such as a circular notch. Keep those source shapes in the sketch; hiding them is fine. Each Loft section must remain one connected closed region without holes. Missing sources produce a Combine-specific repair message. This applies to the local OCCT preview; no SVG reimport is needed for a sketch Combine result.
Recommended test
Start with a predictable two-section body.
- Create two offset planes and draw one closed profile on each.
- Choose Loft and click the profiles in Start-to-End order.
- Inspect the colored section markers and correspondence lines.
- Create the body, edit one source profile and confirm the Loft rebuilds.
- Repeat with endpoint tangency or one valid side guide.
Choose two to twelve sections
Each Loft section must be one visible closed sketch face on a distinct ordered plane. Click the profiles from Start to End. Use reverse order when the complete stack is correct but its direction is backwards.
Read the seams before committing
Matching low-complexity polygons retain exact corner-to-corner stations. Mixed or curved profiles use even arc-length sampling from a common positive local-X seam. Adjust a section's normalized seam only when the visible correspondence lines show an unwanted twist.
A valid-looking silhouette is not enough. Resolve crossing, collapse and opposing-correspondence diagnostics before creating the body.
Control how the surface leaves and enters
Start and End can independently use plane-normal tangency with a 10–100% influence. This makes the surface leave or enter perpendicular to the endpoint plane while the intermediate sections continue to control the body.
Drive intermediate curvature
Turn on Use guide rails, choose the guide's sketch plane, then select up to eight existing open Line, Arc, Spline or connected mixed chains. Every enabled rail must touch and cross every ordered Loft section once. Valid guide intersections become authoritative and disable manual seam adjustments.
Guarded solid creation
- Loft creates an associative New Body from two to twelve ordered sections
- Every guide must intersect every section once and remain consistently ordered
- Unsafe crossings, collapse and unresolved correspondence block creation
- Shelling a Loft and general Loft Boolean operations require a later solid kernel
Learn this step by step
