Fixed an issue where faces being extruded using the shift+click were invisible (#621)

Author: varinotmUnity

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - [PBLD-164] Fixed a bug with UV autostitching where the position offset would not take into account the face rotation center offset.
 - [PBLD-251] Fixed a bug which would cause out of bounds exceptions when exporting meshes with quad topology
 - [PBLD-253] Removes call to internal API that is being removed.
+- [PBLD-255] Fixed an issue where faces being extruded using the shift+click were invisible
 
 ## [6.0.6] - 2025-07-01
 

Editor/EditorCore/VertexManipulationTool.cs

@@ -320,6 +320,9 @@ static void Extrude()
             var selection = MeshSelection.topInternal;
             var selectMode = ProBuilderEditor.selectMode;
 
+            // A small epsilon is added to avoid the created face being detected as a degenerate triangle
+            const float epsilon = .00001f;
+
             foreach (var mesh in selection)
             {
                 switch (selectMode)
@@ -329,7 +332,7 @@ static void Extrude()
                             goto default;
 
                         Edge[] newEdges = mesh.Extrude(mesh.selectedEdges,
-                                0f,
+                                epsilon,
                                 s_ExtrudeEdgesAsGroup,
                                 ProBuilderEditor.s_AllowNonManifoldActions);
 
@@ -345,7 +348,7 @@ static void Extrude()
 
                         if (len > 0)
                         {
-                            mesh.Extrude(mesh.selectedFacesInternal, s_ExtrudeMethod, 0f);
+                            mesh.Extrude(mesh.selectedFacesInternal, s_ExtrudeMethod, epsilon);
                             mesh.SetSelectedFaces(mesh.selectedFacesInternal);
                             ef += len;
                         }