by Marius Silaghi·Modeling
Illustrative cover generated by AnyPlugins — no product screenshot available.
Tri Fill Pro earns its place in the 3ds Max library as a focused modifier for filling holes with triangles that respect the surrounding polygon density. Worth noting the current limitation: it interpolates sharp features near the border too, so edges meant to stay crisp can soften.
Tri Fill Pro is a modifier for 3ds Max that fills shape holes with triangles, blending the new geometry into the rest of the mesh. It takes polygon density into account, so it can transition smoothly from a low poly to a high poly region rather than leaving a uniform patch. You can also set the general triangle density of the filled holes.
For controlling how the fill meets the existing surface, the modifier provides three continuity settings: Curvature, Tangent and Flat. One current limitation is that it smoothly interpolates even sharp features near the border, so crisp edges along the hole may be softened as part of the blend.
The modifier is aimed at repairing geometry and at modeling more easily and faster. One approach it supports is roughing out shapes quickly with triangles, then quad remeshing or retopologizing the mesh later with a separate tool. Version 1.0 was last updated in September 2024, and it covers a broad span of 3ds Max releases.
Tri Fill Pro is best for 3ds Max artists filling and repairing mesh holes, or roughing out geometry with triangles before quad remeshing or retopologizing later.
Tri Fill Pro is completely free to download and use.
Tri Fill Pro is listed as compatible with 3ds Max versions from 2013 through 2024. The developer's requirements go further, noting it works with 3ds Max 2013 through 2027 in 64-bit form. That covers more than a decade of releases. If you run a version outside the listed range, check the developer's page for the current compatibility list before installing, since the listed range and the developer's stated range differ here.
Tri Fill Pro fills holes with triangles and blends them into the rest of the mesh, taking polygon density into account so it can transition smoothly from a low poly to a high poly region. It offers three continuity settings for this blending: Curvature, Tangent and Flat. You can also control the general triangle density of the filled holes. One current limitation is that it smoothly interpolates even sharp features near the border, so edges that should stay crisp may be softened.
Tri Fill Pro can be used to repair geometry and to model more easily and faster. One workflow it supports is modeling quickly with triangles, then quad remeshing or retopologizing the mesh later with another tool. Because it accounts for polygon density, the filled areas blend from low poly to high poly regions rather than sitting as a flat patch. The triangle density of the filled holes is adjustable, so you can tune how dense the generated fill is.
Tri Fill Pro is listed as free in this catalog. Licensing terms can change, so for the current pricing and license type it's best to check the developer's page on Marius Silaghi's site. That page is also where you can get the plugin and see its full compatibility details. A demo video is available as well if you'd like to see more before installing.
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