diff --git a/source/GM-TE/GMTEBrush.class.st b/source/GM-TE/GMTEBrush.class.st
new file mode 100644
index 00000000..0a554a76
--- /dev/null
+++ b/source/GM-TE/GMTEBrush.class.st
@@ -0,0 +1,105 @@
+Class {
+	#name : #GMTEBrush,
+	#superclass : #Object,
+	#instVars : [
+		'currentBrush',
+		'radius',
+		'startMatrixIndex'
+	],
+	#category : #'GM-TE-UI'
+}
+
+{
+	#category : #accessing,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:48'
+}
+GMTEBrush >> currentBrush [
+	^ currentBrush
+]
+
+{
+	#category : #accessing,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:48'
+}
+GMTEBrush >> currentBrush: anObject [
+	currentBrush := anObject
+]
+
+{
+	#category : #'as yet unclassified',
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 13:17'
+}
+GMTEBrush >> executeWithMatrixIndex: anIndex [
+
+	self startMatrixIndex: anIndex.
+	^ self currentBrush value.
+]
+
+{
+	#category : #accessing,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:48'
+}
+GMTEBrush >> radius [
+	^ radius
+]
+
+{
+	#category : #accessing,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:48'
+}
+GMTEBrush >> radius: anObject [
+	radius := anObject
+]
+
+{
+	#category : #forms,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:50'
+}
+GMTEBrush >> radiusBrush [
+
+    | collection xMin xMax yMin yMax |
+    self startMatrixIndex ifNil: [^nil].
+
+    collection := OrderedCollection new.
+
+    xMin :=  self startMatrixIndex x - self radius.
+    xMax :=  self startMatrixIndex x + self radius.
+    yMin :=  self startMatrixIndex y - self radius.
+    yMax :=  self startMatrixIndex y + self radius.
+
+    (xMin to: xMax) do: [:x |
+        (yMin to: yMax) do: [:y |
+            (( self startMatrixIndex x - x) squared + ( self startMatrixIndex y - y) squared <= self radius squared) ifTrue: [
+                collection add: (x@y)
+            ].
+        ].
+    ].
+
+    ^collection
+
+]
+
+{
+	#category : #select,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 13:16'
+}
+GMTEBrush >> selectRadiusBrush [
+
+	self currentBrush: [self radiusBrush]
+]
+
+{
+	#category : #accessing,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:48'
+}
+GMTEBrush >> startMatrixIndex [
+	^ startMatrixIndex
+]
+
+{
+	#category : #accessing,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:48'
+}
+GMTEBrush >> startMatrixIndex: anObject [
+	startMatrixIndex := anObject
+]
diff --git a/source/GM-TE/GMTEEditor.class.st b/source/GM-TE/GMTEEditor.class.st
index d1cd7307..6bca6e8f 100644
--- a/source/GM-TE/GMTEEditor.class.st
+++ b/source/GM-TE/GMTEEditor.class.st
@@ -18,7 +18,7 @@ Class {
 		'associatedMorph',
 		'commands',
 		'currentCommand',
-		'brushMode'
+		'brush'
 	],
 	#category : #'GM-TE-UI'
 }
@@ -273,18 +273,18 @@ GMTEEditor >> blendSelectedLayers [
 
 {
 	#category : #accessing,
-	#'squeak_changestamp' : 'Valentin Teutschbein 7/5/2024 15:39'
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:54'
 }
-GMTEEditor >> brushMode [
-	^ brushMode
+GMTEEditor >> brush [
+	^ brush
 ]
 
 {
 	#category : #accessing,
-	#'squeak_changestamp' : 'Valentin Teutschbein 7/5/2024 15:39'
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:54'
 }
-GMTEEditor >> brushMode: anObject [
-	brushMode := anObject
+GMTEEditor >> brush: anObject [
+	brush := anObject
 ]
 
 {
@@ -1047,7 +1047,7 @@ GMTEEditor >> importMenu [
 
 {
 	#category : #initialization,
-	#'squeak_changestamp' : 'Alex M 7/3/2024 23:57'
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 13:01'
 }
 GMTEEditor >> initialize [
 	"starts the tile editor"
@@ -1063,7 +1063,10 @@ GMTEEditor >> initialize [
 		ratio: 1;
 		savedSinceModified: true;
 		updateButtonEnabled;
-		changed: #getLayerList
+		changed: #getLayerList;
+		brush: GMTEBrush new.
+	self brush radius: 1.
+	self brush selectRadiusBrush
 ]
 
 {
diff --git a/source/GM-TE/GMTEEditorTileMap.class.st b/source/GM-TE/GMTEEditorTileMap.class.st
index 6cbc7fd9..489dfb71 100644
--- a/source/GM-TE/GMTEEditorTileMap.class.st
+++ b/source/GM-TE/GMTEEditorTileMap.class.st
@@ -113,7 +113,7 @@ GMTEEditorTileMap >> model: anObject [
 
 {
 	#category : #'event handling',
-	#'squeak_changestamp' : 'Valentin Teutschbein 7/5/2024 17:39'
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 13:13'
 }
 GMTEEditorTileMap >> mouseDown: anEvent [
 	"Implements placement of tiles"
@@ -123,7 +123,7 @@ GMTEEditorTileMap >> mouseDown: anEvent [
 		ifTrue: [
 			activeLayer := self model selectedLayers anyOne.
 			
-			selectedCoordinates := self radiusBrushFromCenter: (self tileIndexFromPosition: anEvent position) withRadius: 1.
+			selectedCoordinates := self model brush executeWithMatrixIndex: (self tileIndexFromPosition: anEvent position).
 			self updateTiles: selectedCoordinates inLayer: activeLayer FromEvent: anEvent].
 	
 	^ true
@@ -131,27 +131,24 @@ GMTEEditorTileMap >> mouseDown: anEvent [
 
 {
 	#category : #'event handling',
-	#'squeak_changestamp' : 'Alex M 7/5/2024 21:29'
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 13:17'
 }
 GMTEEditorTileMap >> mouseMove: anEvent [
-
-	self mouseDown: anEvent
 	"Implements highlighting of tiles when hovering"
-"
-	| hoveredTile hoveredTileHighlighting activeLayer |
-	self model singleLayerSelected
-		ifTrue: [activeLayer := self model selectedLayers anyOne.
-	
-		hoveredTile := self tileFromPosition: anEvent position layer: activeLayer.
-		hoveredTileHighlighting := self highlightingTileFromPosition: anEvent position.
+
+	| hoveredTileHighlighting activeLayer selectedCoordinates |
+	self model singleLayerSelected ifFalse: [^ nil].
 	
+	activeLayer := self model selectedLayers anyOne.
+	selectedCoordinates := self model brush executeWithMatrixIndex: (self tileIndexFromPosition: anEvent position).
+	selectedCoordinates ifNil: [
 		self tileSelectionSet clearAllHighlightings.
-	
-		hoveredTileHighlighting ifNotNil: [self tileSelectionSet highlightTile: hoveredTileHighlighting].
-	
-		TODO why another ifNil check here?
-		
-		self updateTile: hoveredTile inLayer: activeLayer FromEvent: anEvent]"
+		^ nil].
+	self tileSelectionSet clearAllHighlightings.
+	selectedCoordinates do: [:c|
+		hoveredTileHighlighting := self highlightingTileFromIndex: c.
+		hoveredTileHighlighting ifNotNil: [self tileSelectionSet highlightTile: hoveredTileHighlighting]].
+	self updateTiles: selectedCoordinates inLayer: activeLayer FromEvent: anEvent.
 ]
 
 {
@@ -179,21 +176,6 @@ GMTEEditorTileMap >> previousTileStates: anObject [
 	previousTileStates := anObject
 ]
 
-{
-	#category : #initialization,
-	#'squeak_changestamp' : 'Alex M 7/5/2024 21:30'
-}
-GMTEEditorTileMap >> radiusBrushFromCenter: aPos withRadius: aRadius [
-	
-	|collection|
-	aPos ifNil: [^nil].
-	self flag: 'temporary only'.
-	collection := OrderedCollection new.
-	collection add: aPos.
-	collection add: (aPos + (0@1)).
-	^ collection
-]
-
 {
 	#category : #updating,
 	#'squeak_changestamp' : 'Ivo Zilkenat 6/24/2024 11:35'
@@ -333,14 +315,14 @@ GMTEEditorTileMap >> updateTileSprite: aTile [
 
 {
 	#category : #updating,
-	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 11:41'
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:00'
 }
 GMTEEditorTileMap >> updateTiles: aCoordinateCollection inLayer: aLayer FromEvent: anEvent [
 	"Add currently selected tile (model) to editable matrix stack at mouse position"
 	| tile |
 	
 	(self tileIndexFromPosition: anEvent position) ifNil: [^ nil].
-	
+	self flag: 'saveNewImage confict with alex fix?'.
 	(anEvent redButtonPressed and: [self model selectedTile notNil]) 
 		ifTrue: [
 			aCoordinateCollection do: [:c |
diff --git a/source/GM-TE/GMTETileMap.class.st b/source/GM-TE/GMTETileMap.class.st
index 56ad7bfd..c20af234 100644
--- a/source/GM-TE/GMTETileMap.class.st
+++ b/source/GM-TE/GMTETileMap.class.st
@@ -466,16 +466,14 @@ GMTETileMap >> hideHighlightingLayer [
 
 {
 	#category : #accessing,
-	#'squeak_changestamp' : 'Ivo Zilkenat 6/24/2024 11:08'
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/6/2024 12:11'
 }
-GMTETileMap >> highlightingTileFromPosition: aPoint [
+GMTETileMap >> highlightingTileFromIndex: anIndex [
 	"Answer the sender with a highlighting tile at aPoint if present"
 
-	| index |
-	index := self tileIndexFromPosition: aPoint.
-	index ifNil: [^ nil].
+	anIndex ifNil: [^ nil].
 	
-	^ self tileMatrixStackHighlighting layer: 1 at: index y at: index x
+	^ self tileMatrixStackHighlighting layer: 1 at: anIndex y at: anIndex x
 ]
 
 {