Add True Mirror

plugins.json

@@ -1649,6 +1649,21 @@
 		"bug_tracker": "https://github.com/hrmcngs/sb-worn-display-blockbench/issues",
 		"creation_date": "2026-05-31"
 	},
+	"true_mirror": {
+		"title": "True Mirror",
+		"author": "Kegoscho",
+		"icon": "icon.svg",
+		"description": "Mirrors only the change you actually made, instead of symmetrizing the whole element. Asymmetric detail survives unrelated mirrored edits. Move, rotate, scale and extrude, across any axis and around either world zero or the element's own pivot.",
+		"tags": ["Edit", "Meshes", "Mirror"],
+		"version": "1.0.0",
+		"min_version": "5.1.0",
+		"variant": "both",
+		"new_repository_format": true,
+		"has_changelog": true,
+		"repository": "https://github.com/Kegoscho/true-mirror",
+		"bug_tracker": "https://github.com/Kegoscho/true-mirror/issues",
+		"creation_date": "2026-08-04"
+	},
 	"structure_to_model": {
 		"title": "Structure to Model",
 		"author": "Mester",

plugins/true_mirror/LICENSE.MD

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Kegoscho
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

plugins/true_mirror/about.md

@@ -0,0 +1,39 @@
+Blockbench's built-in Mirror Modeling re-symmetrizes the whole element after every edit, using
+your edit only as a trigger. Put an off-centre detail on one side, edit something unrelated, and
+the detail gets duplicated across or deleted.
+
+True Mirror mirrors the edit itself. Move a vertex, its counterpart moves the same way. Anything
+you did not touch is left alone, symmetric or not.
+
+## What it does
+
+- Move, rotate and scale in vertex, edge and face selection modes
+- Extrude. The new geometry and its side walls are mirrored across
+- Mirror across X, Y or Z, set from a dropdown in the toolbar
+- Two mirror planes. Global uses world zero. Local uses the element's own pivot, so a part
+  sitting off to one side can still mirror around itself
+- Rotated elements work under Local, where the plane rotates with the element
+- A translucent guide shows where the mirror plane actually is
+
+## When it will not mirror, it says so
+
+Some edits cannot be mirrored safely. The plugin skips those and puts a message on screen naming
+the cause, and the fix where there is one. An off-centre pivot reports how far off it is.
+
+## What it does not do
+
+- Loop cut, knife and deletion are not mirrored. Those edits pass through untouched
+- Nothing is welded at the seam. An extrusion landing on or across the mirror plane is skipped
+  rather than half-applied
+- Mirroring happens inside one element. It will not pair one mesh with a separate mirrored mesh,
+  so rigged limb pairs are out
+- New faces get a copy of the source face's UVs. The UVs themselves are not mirrored
+- Moving a whole element as a body does nothing. Sub-selections only
+- Mesh elements only, and Blockbench's own Mirror Modeling has to be off
+
+I built this for my own use while working on a personal project. It is my first Blockbench
+plugin, and I am publishing it because people asked for it and because the problem it solves
+has several open issues against Blockbench. It works and it is tested, though that testing was
+done by hand on one setup. Support is not guaranteed.
+
+Full documentation and the reasoning behind the limits is in the README.

plugins/true_mirror/changelog.json

@@ -0,0 +1,32 @@
+{
+	"1.0.0": {
+		"title": "1.0.0",
+		"date": "2026-08-04",
+		"author": "Kegoscho",
+		"categories": [
+			{
+				"title": "Features",
+				"list": [
+					"Mirrors only the edit you made, so asymmetric detail elsewhere on the model is left alone",
+					"Move, rotate and scale in vertex, edge and face selection modes",
+					"Extrude, including the new side walls and the matching face on the other side",
+					"Mirror across X, Y or Z, set from a dropdown in the toolbar",
+					"Two mirror planes: Global uses world zero, Local uses the element's own pivot",
+					"Rotated elements work under Local, where the plane rotates with the element",
+					"A translucent guide shows where the mirror plane actually is",
+					"Edits that cannot be mirrored safely are skipped with a message naming the cause"
+				]
+			},
+			{
+				"title": "Known limits",
+				"list": [
+					"Loop cut, knife and deletion are not mirrored",
+					"Extrusions landing on or across the mirror plane are skipped, since nothing is welded at the seam",
+					"Mirroring happens inside one element, so rigged limb pairs are not paired up",
+					"New faces copy the source face's UVs; the UVs themselves are not mirrored",
+					"Mesh elements only, and Blockbench's built-in Mirror Modeling has to be off"
+				]
+			}
+		]
+	}
+}