diff --git a/Diya/AssetManager.class.st b/Diya/AssetManager.class.st
index 2188207..414c5c5 100644
--- a/Diya/AssetManager.class.st
+++ b/Diya/AssetManager.class.st
@@ -21,12 +21,14 @@ AssetManager class >> fromLocation: loc [
 
 { #category : #adding }
 AssetManager >> addAsset: value [
-	assets at: value name put: value
+	assets at: value name put: value.
+	^ value
 ]
 
 { #category : #adding }
 AssetManager >> addAssetName: name value: value [
-	assets at: name put: value
+	assets at: name put: value.
+	^ value
 ]
 
 { #category : #'instance creation' }
diff --git a/Diya/Diya2DPrimShape.class.st b/Diya/Diya2DPrimShape.class.st
index 965e926..1b0b5e0 100644
--- a/Diya/Diya2DPrimShape.class.st
+++ b/Diya/Diya2DPrimShape.class.st
@@ -29,10 +29,9 @@ Diya2DPrimShape >> draw [
 	"configure vao vbo for texture QUAD"
 	self texture ifNotNil: [
 		self texture setup.
-		context texture0 setImage2D: self texture.
-		context texture0 active. 	
+		context useTexture: self texture.	
 	].
-	context vbo data: GL_ARRAY_BUFFER data: vbuffer usage: GL_DYNAMIC_DRAW.
+	context submitData: vbuffer.
 	OpenGL drawArrays: type first:0  count:((vbuffer size )>> 2 ).
 	"reset value"
 	self texture ifNotNil: [self texture drop.].
@@ -87,9 +86,16 @@ Diya2DPrimShape >> setUpShader [
 	super setUpShader.
 	self shader
 			setUniform: #u_color value: (self ? #color) asGL4FArray;
-			setUniform: #u_bg_color value: (self ? #bgColor) asGL4FArray;
-			setUniform: #u_texture_type value:
-				(self texture ifNil: [ 0 ] ifNotNil:[self texture format]).
+			setUniform: #u_bg_color value: (self ? #bgColor) asGL4FArray.
+	self texture ifNotNil: [
+			self shader
+				setUniform: #u_texture value: self texture unit;
+				setUniform: #u_texture_type value: self texture format.
+		]
+		ifNil:
+		[
+			self shader setUniform: #u_texture_type value: 0.
+		].
 ]
 
 { #category : #accessing }
diff --git a/Diya/DiyaExampleApp.class.st b/Diya/DiyaExampleApp.class.st
index b910cc8..bfc9b49 100644
--- a/Diya/DiyaExampleApp.class.st
+++ b/Diya/DiyaExampleApp.class.st
@@ -13,7 +13,7 @@ DiyaExampleApp >> cleanup [
 DiyaExampleApp >> defineStyleSheet [
 	|fmgr style|
 	fmgr := DiyaFontManager uniqueInstance.
-	#(16 24) do:[:fontSize|
+	#(16 18 24) do:[:fontSize|
 		self stdlog: 'Init font size ', fontSize asString, ' of ', fmgr defaultFamily.
 		style := fmgr style: fmgr defaultStyle   from: fmgr defaultFamily.
 		style textureOf: fontSize.
@@ -85,11 +85,11 @@ DiyaExampleApp >> setup [
 	label styleName:#text_icon_1.
 	label icon: 16rF254.
 	
-	"node1 := root addNode: (DiyaRectangle size:100@150 shader: DiyaExampleShader uniqueInstance) at: 300 @ 40.
+	node1 := root addNode: (DiyaRectangle size:100@150 shader: DiyaExampleShader uniqueInstance) at: 300 @ 40.
 	node1 rotation: 45.
 	node1 scale: 2.0@2.0.
 	node1 on: #(mousebuttondown fingerdown) do:[:e|
-		label txt: 'RECT ', (node1 local: e mapped worldPosition) asIntegerPoint asString]."
+		label txt: 'RECT ', (node1 local: e mapped worldPosition) asIntegerPoint asString].
 	
 	img := root addNode: (DiyaImageView from:'mrsang.png') at: 10 @ 400.
 	img styleName: #image_view.
diff --git a/Diya/DiyaFontManager.class.st b/Diya/DiyaFontManager.class.st
index 15f94ef..9655a22 100644
--- a/Diya/DiyaFontManager.class.st
+++ b/Diya/DiyaFontManager.class.st
@@ -66,7 +66,7 @@ DiyaFontManager >> loadFace: face [
 DiyaFontManager >> loadFile: aFile [
 	| path face i numfaces |
 	path := aFile fullName convertToWithConverter: UTF8TextConverter new.
-	Transcript show: 'Loading font file ', path;cr.
+	self stdlog: 'Loading font file ', path.
 	i := 0.
 	numfaces := nil.
 	[ face := FreeTypeFace basicNew
diff --git a/Diya/DiyaImageTex.class.st b/Diya/DiyaImageTex.class.st
index 98b831a..1af8129 100644
--- a/Diya/DiyaImageTex.class.st
+++ b/Diya/DiyaImageTex.class.st
@@ -1,9 +1,6 @@
 Class {
 	#name : #DiyaImageTex,
 	#superclass : #OpenGLTexImage2D,
-	#instVars : [
-		'name'
-	],
 	#pools : [
 		'OpenGLConstants',
 		'OpenGLTypes'
@@ -55,6 +52,7 @@ DiyaImageTex >> fromDisplay:  aRect as: assetName [
 	data ifNotNil: [data free].
 	width := aRect extent x asInteger.
 	height := aRect extent y asInteger.
+	commited := false.
 	data := FFIExternalArray externalNewType: GLubyte size: self bytesSize.
 	LibC memset: data getHandle value: 0 size: data size.
 	data autoRelease.
@@ -89,6 +87,7 @@ DiyaImageTex >> fromFile: aPath [
 	LibC memCopy: surface pixels getHandle to: data getHandle size: data size.
 	SDL2 
 		freeSurface: surface.
+	commited := false.
 	self stdlog: 'Loaded ', aPath fullName.
 ]
 
@@ -100,6 +99,7 @@ DiyaImageTex >> fromForm: aForm name: aName [
 	surface := self surfaceFromForm: aForm.
 	width := surface w.
 	height := surface h.
+	commited := false.
 	data := FFIExternalArray externalNewType: GLubyte size: self bytesSize.
 	LibC memset: data getHandle value: 0 size: data size.
 	data autoRelease.
@@ -124,11 +124,6 @@ DiyaImageTex >> mipmap [
 	^false
 ]
 
-{ #category : #accessing }
-DiyaImageTex >> name [
-	^ name
-]
-
 { #category : #accessing }
 DiyaImageTex >> setup [
 	OpenGLTexture
diff --git a/Diya/DiyaNode.class.st b/Diya/DiyaNode.class.st
index 05e0fcf..bb10cd3 100644
--- a/Diya/DiyaNode.class.st
+++ b/Diya/DiyaNode.class.st
@@ -267,7 +267,6 @@ DiyaNode >> setUpShader [
 			setUniform: #u_time value: DiyaClock uniqueInstance elapsedTime asFloat;
 			setUniform: #u_projection value: {GL_FALSE. context projection buffer};
 			setUniform: #u_resolution value: { context resolution x. context resolution y };
-			setUniform: #u_texture value: 0;
 			setUniform: #u_transform value: {GL_TRUE. mem}.
 		context mouse ifNotNil: [
 			"in shader, window origin is bottom left conor of the window
diff --git a/Diya/DiyaRendererContext.class.st b/Diya/DiyaRendererContext.class.st
index 81b29e0..de2c4e1 100644
--- a/Diya/DiyaRendererContext.class.st
+++ b/Diya/DiyaRendererContext.class.st
@@ -6,7 +6,7 @@ Class {
 		'display',
 		'vbo',
 		'vao',
-		'texture0',
+		'textures',
 		'projection',
 		'assets',
 		'window',
@@ -45,7 +45,8 @@ DiyaRendererContext >> destroy [
 	vao disableAttribute: 0.
 	vao delete.
 	vbo delete.
-	texture0 delete.
+	textures do: [:e | e key delete ].
+	textures := OrderedCollection new.
 ]
 
 { #category : #accessing }
@@ -58,18 +59,36 @@ DiyaRendererContext >> display: anObject [
 	display := anObject
 ]
 
+{ #category : #rendering }
+DiyaRendererContext >> findTextureUnit [
+	textures withIndexDo: [ :e :i|
+		e value ifNil: [ ^ i - 1]
+	].
+	"random unit value"
+	^ (Random new nextInt: 32) - 1
+]
+
 { #category : #accessing }
 DiyaRendererContext >> initialize [
 	super initialize.
 	vbo := OpenGLVertexBuffer new.
 	vao := OpenGLVertexArray new.
-	texture0 := OpenGLTexture fromUnit: 0.
+	textures := Dictionary new.
 	vao bind.
 	vbo bind: GL_ARRAY_BUFFER.
 	projection := Array2D identity: 4.
 	assets := AssetManager new.
 	vao enableAttribute: 0.
-	OpenGLVertexArray  vertexAttributePointerIndex: 0 size:4 type: GL_FLOAT normalized: GL_FALSE stride: 16 pointer: nil.
+	OpenGLVertexArray
+		vertexAttributePointerIndex: 0
+		size:4
+		type: GL_FLOAT
+		normalized: GL_FALSE
+		stride: 16
+		pointer: nil.
+	textures :=
+		(1 to: 32) collect:[:i|
+			(OpenGLTexture fromUnit: i - 1) -> nil] .
 ]
 
 { #category : #accessing }
@@ -109,9 +128,9 @@ DiyaRendererContext >> root [
 
 ]
 
-{ #category : #accessing }
-DiyaRendererContext >> texture0 [
-	^ texture0
+{ #category : #rendering }
+DiyaRendererContext >> submitData: vbuffer [
+	vbo data: GL_ARRAY_BUFFER data: vbuffer usage: GL_DYNAMIC_DRAW.
 ]
 
 { #category : #'transformation matrices' }
@@ -119,6 +138,24 @@ DiyaRendererContext >> useProjection: aClass [
 	projection := aClass fromDisplay: self display
 ]
 
+{ #category : #rendering }
+DiyaRendererContext >> useTexture: aTexture [
+	|assoc|
+	aTexture unit == -1 ifTrue:[ aTexture unit: self findTextureUnit].
+	assoc := textures at: aTexture unit + 1.
+	assoc value = aTexture ifFalse:[
+		"unregister current texture"
+		assoc value ifNotNil: [ assoc value commited: false ].
+		aTexture commited: false.
+		assoc value: aTexture.
+	].
+	assoc key active.
+	aTexture commited ifTrue:[ ^ self ].
+	"self stdlog: 'Commit data data to texture ', aTexture name, ' on Unit ', aTexture unit asString."
+	assoc key setImage2D: aTexture.
+	aTexture commited: true.
+]
+
 { #category : #accessing }
 DiyaRendererContext >> vao [
 	^ vao
diff --git a/Diya/DiyaRootNode.class.st b/Diya/DiyaRootNode.class.st
index 7b80fab..7acebe6 100644
--- a/Diya/DiyaRootNode.class.st
+++ b/Diya/DiyaRootNode.class.st
@@ -86,7 +86,7 @@ DiyaRootNode >> render [
 			node render.	 
 		].
 	 	(R isNotEmpty or: Q isNotEmpty) and:
-			(DiyaClock uniqueInstance lapDelta asMilliSeconds < maxProcessingTime) 
+			(DiyaClock uniqueInstance lapDelta asMilliSeconds < maxProcessingTime)
 	] whileTrue
 ]
 
diff --git a/Diya/OpenGLFontTex.class.st b/Diya/OpenGLFontTex.class.st
index abaee96..ae3e89b 100644
--- a/Diya/OpenGLFontTex.class.st
+++ b/Diya/OpenGLFontTex.class.st
@@ -26,7 +26,7 @@ OpenGLFontTex class >> fromFace: face ofSize: size [
 	^self new fromFace: face ofSize: size; yourself
 ]
 
-{ #category : #'instance creation' }
+{ #category : #processing }
 OpenGLFontTex >> blitPixel8: bitmap at: offset size: size [
 	size = (0@0) ifTrue:[^self].
 	0 to: size y - 1 do: [ :i|
@@ -52,9 +52,9 @@ OpenGLFontTex >> charmap [
 { #category : #accessing }
 OpenGLFontTex >> drop [
 	OpenGL
-		pixelstorei: GL_UNPACK_ALIGNMENT param: 4;
+		pixelstorei: GL_UNPACK_ALIGNMENT param: 4";
 		disable: GL_CULL_FACE;
-		disable: GL_BLEND.
+		disable: GL_BLEND".
 ]
 
 { #category : #accessing }
@@ -67,6 +67,8 @@ OpenGLFontTex >> fromFace: aFace  ofSize: size [
 	|minhang rec iptr charcode w numw|
 	fontSize := size.
 	face := aFace.
+	commited := false.
+	name := aFace familyName, '@', aFace styleName,'@', size asString.
 	charmap := Dictionary new.
 	face setPixelWidth:0 height: self fontSize.
 	cellw := cellh := minhang := maxbearing := 0.
@@ -100,7 +102,7 @@ OpenGLFontTex >> fromFace: aFace  ofSize: size [
 	iptr free.
 ]
 
-{ #category : #accessing }
+{ #category : #processing }
 OpenGLFontTex >> genGlyph:c [
 	|rec  offset glyph gsize|
 	face setPixelWidth:0 height: self fontSize. 
@@ -122,13 +124,20 @@ OpenGLFontTex >> genGlyph:c [
 			self reallocateBuffer.
 		]. 
 	].
+	commited := false.
 	^glyph
 	
 ]
 
+{ #category : #processing }
+OpenGLFontTex >> genPrintableASCII [
+	33 to: 126 do: [ :c| self genGlyph: c ]
+]
+
 { #category : #accessing }
 OpenGLFontTex >> getGlyph: c [
-	^(self charmap at: c ifAbsentPut:[self genGlyph:c])
+	^(self charmap at: c ifAbsentPut:[
+		self genGlyph:c])
 ]
 
 { #category : #initialization }
@@ -156,7 +165,7 @@ OpenGLFontTex >> meanww [
 	^ meanww
 ]
 
-{ #category : #accessing }
+{ #category : #processing }
 OpenGLFontTex >> reallocateBuffer [
 	|newbuffer|
 	maxrows := maxrows + 4.
@@ -169,12 +178,12 @@ OpenGLFontTex >> reallocateBuffer [
 	
 ]
 
-{ #category : #accessing }
+{ #category : #initialization }
 OpenGLFontTex >> setup [
 	OpenGL
-		enable: GL_CULL_FACE;
+		"enable: GL_CULL_FACE;
 		enable: GL_BLEND;
-		blendFnWithSfactor: GL_SRC_ALPHA dfactor: GL_ONE_MINUS_SRC_ALPHA;
+		blendFnWithSfactor: GL_SRC_ALPHA dfactor: GL_ONE_MINUS_SRC_ALPHA;"
 		pixelstorei: GL_UNPACK_ALIGNMENT param: 1.
 	OpenGLTexture
 		parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_WRAP_S param: GL_CLAMP_TO_EDGE;
diff --git a/Diya/OpenGLTexImage2D.class.st b/Diya/OpenGLTexImage2D.class.st
index c993b2a..fd8e93a 100644
--- a/Diya/OpenGLTexImage2D.class.st
+++ b/Diya/OpenGLTexImage2D.class.st
@@ -10,7 +10,10 @@ Class {
 		'border',
 		'format',
 		'type',
-		'data'
+		'data',
+		'unit',
+		'commited',
+		'name'
 	],
 	#pools : [
 		'OpenGLConstants',
@@ -34,6 +37,16 @@ OpenGLTexImage2D >> bytesSize [
 	^(width * height) << 2 
 ]
 
+{ #category : #accessing }
+OpenGLTexImage2D >> commited [
+	^ commited
+]
+
+{ #category : #accessing }
+OpenGLTexImage2D >> commited: anObject [
+	commited := anObject
+]
+
 { #category : #accessing }
 OpenGLTexImage2D >> data [
 	^ data
@@ -87,6 +100,13 @@ OpenGLTexImage2D >> height: anObject [
 	height := anObject
 ]
 
+{ #category : #initialization }
+OpenGLTexImage2D >> initialize [
+	super initialize.
+	unit := -1.
+	commited := false
+]
+
 { #category : #accessing }
 OpenGLTexImage2D >> internalFormat [
 	^ internalFormat
@@ -112,6 +132,11 @@ OpenGLTexImage2D >> mipmap [
 	^false
 ]
 
+{ #category : #accessing }
+OpenGLTexImage2D >> name [
+	^ name
+]
+
 { #category : #accessing }
 OpenGLTexImage2D >> setup [
 	^self subclassResponsibility
@@ -137,6 +162,16 @@ OpenGLTexImage2D >> type: anObject [
 	type := anObject
 ]
 
+{ #category : #accessing }
+OpenGLTexImage2D >> unit [
+	^ unit
+]
+
+{ #category : #accessing }
+OpenGLTexImage2D >> unit: anObject [
+	unit := anObject
+]
+
 { #category : #accessing }
 OpenGLTexImage2D >> width [
 	^ width