by KushiroCG·Modeling
Images © KushiroCG. Used for product review; image policy.
Delta Quad earns its place for a face-by-face approach to quad conversion that works from the original faces and edges to keep the mesh shape, backed by a cross-platform pure-Python build. It follows three years of algorithm experiments after Beta Quad.
Delta Quad is a topology add-on for Blender that slices a large N-gon face into smaller quads. It is the successor to Beta Quad, following a path from N-gons to quads to sub-division. Rather than covering a mesh with quads of constant size, it works from the original faces and edges to keep the shape intact.
The add-on supports progressive quad conversion: select a few faces, run Delta Quad, then repeat on nearby faces while leaving the rest unchanged. This gives step-by-step control over the topology. It offers two modes for quad flow arrangement and handles low quad counts. Written in pure Python, it runs across CPUs and platforms, including Intel, ARM and Apple M1.
The tool is highly experimental and may not work for every kind of mesh, and it is not intended to retopologize high-density sculpted meshes down to a low quad surface. To use it, enter Edit mode, switch to Face mode, select faces, right-click in the viewport, and choose Delta Quad from the context menu.
Delta Quad is best for blender modelers who want to convert N-gon faces into quads one selection at a time, keeping the original shape and controlling the topology step by step.
Delta Quad is completely free to download and use.
Delta Quad lists compatibility with Blender versions 2.83 through 5.1 and is marked as Blender Extension compatible. It is distributed as an add-on under the GPL license, and the current release is version 1.2.0. That range spans a wide set of Blender releases, from older versions up to recent ones. For versions outside that stated range, or to confirm the latest supported release, check the developer's page before installing.
Delta Quad is used from inside Blender's Edit mode. Switch to Face select mode, select the faces you want to convert, right-click in the 3D viewport, and choose Delta Quad from the bottom of the context menu. The add-on then slices the selected N-gon faces into quads. You can also work progressively: convert a few faces, run the tool, then repeat on nearby faces while leaving the rest unchanged, which keeps step-by-step control over the topology.
Delta Quad is written in pure Python, so it runs across CPUs and operating systems, including Intel, ARM and Apple M1 machines. The developer's stated aim is that if you can run Blender, you can run the tool. That said, it is described as highly experimental and may not work for every kind of mesh, so results can vary depending on the geometry you give it.
Delta Quad is not built to retopologize sculpted, high-density meshes down to a low quad surface. It focuses instead on slicing large N-gon faces into smaller quads while working from the original faces and edges to keep the shape. Rather than covering a whole mesh with evenly sized quads, it converts selected faces one step at a time. For dense sculpts, a dedicated retopology tool would be a better fit.
Delta Quad is listed as free in this catalog and is distributed under the GPL license as a Blender add-on. Licensing and availability can change over time, so check the developer's page for current terms before downloading. As a GPL-licensed add-on, its source is available under that license's terms. It holds a five-star rating from ten reviews on its source listing.
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