by kleinARt·Workflow
Illustrative cover generated by AnyPlugins — no product screenshot available.
AngelSTEP stands out in the superhive library for combining STEP and IGES import, defeaturing and real STEP export in one self-contained add-on. Note that defeaturing is a work in progress and will keep improving.
AngelSTEP is a self-contained Blender add-on for importing and exporting STEP and IGES files. Its analytic engine rebuilds rounds, fillets and bevels as clean structured geometry, welds shared edges and preserves exact CAD normals. The result is optimized mesh output that shades correctly up close and needs far less manual repair, staying watertight whenever the source CAD allows.
Import once, then rebuild one part, a selection or the full scene at a different resolution without starting over. Per-part resolution, mesh mode, hole removal and cleanup settings stay live, with AngelFLOW adaptive render topology or AngelGRID even quad grids. Re-tessellation, mode switching and closing holes happen without re-import, and metric and imperial values follow your Blender scene units.
Version 1.6 adds a defeaturing panel that removes holes, fillets, chamfers, recesses and bosses before meshing, with each removal baked into STEP export. Three closed-form engines replace a slow boolean solver. Multi-core import, meshing and rebuilds handle large assemblies, cached CAD reads speed repeat imports, and Check Size previews model size, object count and a safe starting resolution. It runs on Blender 4.2+ across Windows 64-bit, Linux and macOS.
Angel Step - Cad Step / Iges / Brep Importer & Exporter is best for working with manufacturer parts, client STEP files, engineering assemblies and product-design CAD data inside Blender.
Angel Step - Cad Step / Iges / Brep Importer & Exporter is completely free to download and use.
AngelSTEP requires Blender 4.2 or newer and runs on Windows 64-bit, Linux and macOS. It ships as a self-contained add-on for importing and exporting STEP and IGES files, producing watertight meshes with crisp CAD normals. After importing, you can rebuild one part, a selection or the full scene at a different resolution without starting over. The version featured here is 1.6, which adds the new defeaturing panel. For current licensing and to download the add-on, check the developer's page.
AngelSTEP supports real STEP export, so you can import CAD, optimize, render, texture and then export back to STEP within one add-on. Every defeaturing removal is baked into the STEP export, not just the mesh, so holes, recesses, bosses and fillets or chamfers you strip carry through to the exported file. This suits workflows that move engineering assemblies and product-design data in and out of Blender while keeping the geometry usable on both sides.
AngelSTEP is built for heavy CAD, using multi-core import, meshing and rebuilds across large assemblies. Cached CAD reads give near-instant repeat imports, and the Check Size tool previews model size, object count and a safe starting resolution before you import. It includes robust handling for messy real-world STEP files, flagging problem parts for review, and produces watertight output whenever the source CAD allows. Live re-tessellation lets you change mesh quality on one part, a selection or the full scene without re-importing.
AngelSTEP's version 1.6 defeaturing panel removes holes, fillets, chamfers, recesses and bosses before meshing. A Max Fillet / Chamfer control strips rounds and bevels up to a chosen size and stays watertight on turned parts such as bearings, shafts and bushings, while Remove Recesses / Bosses flush-fills sharp pockets and raised pads. It uses three closed-form engines rather than a slow boolean solver, and settings stay adjustable per part at any time. Note that defeaturing is a work in progress and will keep improving.
AngelSTEP is listed as free in this catalog. Pricing and licensing can change, so check the developer's page for the current terms and to download the add-on. The version featured here is 1.6, which adds the new defeaturing panel alongside STEP and IGES import and export, per-part tessellation, CAD-based UVs, assembly tools and real STEP export in one self-contained package. It supports Blender 4.2 and newer on Windows 64-bit, Linux and macOS.
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