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====== ArmA 3 Terrain Builder ======

[[https://www.pmctactical.org/forum/viewforum.php?f=68|ArmA 3 Forum]], [[:arma3|ArmA 3]], [[arma3:config|ArmA 3 Config]], [[arma3:missions|ArmA 3 Missions]], [[arma3:modeling|ArmA 3 3D Modeling]], [[arma3:scripting|ArmA 3 Scripting]], [[arma3:terrain|ArmA 3 Terrain]], [[arma3:texturing|ArmA 3 Texturing]], [[arma3:tools|ArmA 3 Tools]]

[[arma3:terrain:terrain-builder|ArmA 3 Terrain Builder]], [[https://www.pmctactical.org/forum/viewtopic.php?f=70&t=23005|ArmA 3 Terrain Builder Support Forum]]


====== Invalid Triangulation Polygon ======

**Terrain Builder Errors** are always fun to decipher, luckily I have collected intel on many of them through personal experience.

**CPolygonalArea::UpdateGeometry() - Skipped shape: invalid triangulation (triangle 1.6 fails). (polygon_18)**

You can fix this error in Global Mapper by just loading and saving the shape file, or in Terrain Builder by using menu shapes -> find by name, then select the polygon in the error, use action drop-down of "show and select", click OK, then the polygon in question is selected now just hit delete key to delete it.

Definition for bad polygon; can for example be one where lines between vertices cross at some point.