PatchUp Pro

How it compares

SketchUp’s own Edge#find_faces and the free FaceUp extension (MIT, it calls find_faces for each selected edge) build a face only where edges already share vertices. On imported CAD drawings, where lines cross without sharing a vertex, they leave faces out and stack overlapping ones. PatchUp splits the crossings first and builds every enclosed cell from the selected edges in one undo step.

Measured results

Faces created versus the reference face count (overlapping face pairs in brackets):

On a third drawing (3,987 edges) and on a room with an island, all four methods were exact. SketchUp’s Intersect Faces workflow followed by find_faces gave the same face counts as find_faces alone on both CAD drawings.

Method. SketchUp 2025, four public DXF drawings imported with the SketchUp importer, importer faces erased, all edges selected, a fresh model per run. The reference is the polygonize result (shapely) of the imported edges. Measured on 2026-11-11. The skew-loop case was measured on an earlier build where the curved fill was a separate button; it is now the same Make Faces button. A wall-gap case measured with a since-removed gap setting is no longer listed.

Drawing sources and licences (public files on GitHub):

• lv_groundfloor: GitHub Pdhruv15/LV-Design-Suit, Apache-2.0 licence
• kj_floorplan and kj_siteplan: GitHub KanJieTeam/kjdraw, Apache-2.0 licence
• exav_siteplan: GitHub sylvinus/exav, MIT licence

Limits of this comparison

• PatchUp is not faster than find_faces: 1.2 to 2.1 s per press on 3,987 to 8,882 edges, against 0.2 to 1.7 s for find_faces on the same files (FaceUp: 1.5 s against PatchUp’s 2.1 s on the site plan). The faster result is the one with missing and overlapping faces.
• S4U Make Face and Eneroth Face Creator were not tested: S4U is paid and needs activation, and Eneroth’s file was not located. No statement here applies to them.
• Two real CAD drawings separate the tools; on the others the difference is none or one face. The skew-loop case is a small constructed example.
• PatchUp does not find or report gaps: a small break closes only if you raise the Tolerance above it (up to 25.4 mm), and large values can remove faces from thin features. An island loop drawn inside a face without sharing an edge gets a stacked face.