diff --git a/README.md b/README.md
index 77ec33b..6f1c12a 100644
--- a/README.md
+++ b/README.md
@@ -45,9 +45,9 @@ Render an `img`-tag with optional `srcset` based on `sizes` or `resolutions`.
 Props:
 
 - `imageSource`: the imageSource to render
-- `sizes`: array of the needed media queries for the sizes attribute (if no width is given the keys are used as widths)
-- `widths`: array of image-widths that shall be rendered (if no `sizes` but are given `sizes="100vw"` is assumed)
-- `resolutions`: an array of numbers that represents the needed resolutions
+- `sizes`: media queries for the sizes-attribute (arrays are imploded with ', ')
+- `widths`: image-widths (array) that shall be rendered
+- `resolutions`: resolutions factors (array, `widths` has priority)
 - `alt`: alt-attribute for the tag
 - `title`: title attribute for the tag
 
@@ -73,12 +73,7 @@ will render as:
 ```
 imageSource = Sitegeist.Kaleidoscope:DummyImageSource
 widths = ${[320, 400, 600, 800, 1000, 1200, 1600]}
-sizes = Neos.Fusion:RawArray {
-    large = '(min-width: 800px) 1000px'
-    medium = '(min-width: 480px) 800px'
-    small = '(min-width: 320px) 440px'
-    default = '100vw'
-}
+sizes = '(min-width: 800px) 1000px, (min-width: 480px) 800px, (min-width: 320px) 440px, 100vw'
 
 renderer = afx`
     <Sitegeist.Kaleidoscope:Image imageSource={props.imageSource} widths={props.widths} sizes={props.sizes} />
@@ -95,37 +90,21 @@ will render as:
 />
 ```
 
-If the sizes map 1:1 to the different widths the the syntax can be simplified by
-using the keys of sizes as width definitions.
-
-Attention: The keys are sorted in this case so make sure to define the smaller breakpoints at start.
-
-```
-imageSource = Sitegeist.Kaleidoscope:DummyImageSource
-sizes = Neos.Fusion:RawArray {
-    280 = '(max-width: 280px) 280px'
-    440 = '(max-width: 480px) 440px'
-    800 = '(max-width: 800px) 800px'
-    1000 = '100vw'
-}
-
-renderer = afx`
-    <Sitegeist.Kaleidoscope:Image imageSource={props.imageSource} sizes={props.sizes} />
-`
-```
-
-Note: `widths` and / or `sizes are preferred to `resolutions`. If neither is passed the whole `srcset is omitted and only the `src`-attribute is rendered.
-
 ### `Sitegeist.Kaleidoscope:Picture`
 `
 Render a `picture`-tag with various sources.
 
 Props:
 - `imageSource`: the imageSource to render
-- `sources`: an array of source definitions that contains. Each item contains the keys `media`, `sizes`, `widths` or `resolutions` and an optional `imageSource`
-- `sizes`: array of the needed media queries for the sizes attribute of the default image
-- `widths`: array of image-widths that shall be rendered for the default image
-- `resolutions`: an array of numbers that represents the needed resolutions for the default image
+- `sources`: an array of source definitions that supports the following keys
+   - `media`: the media query of this source
+   - `imageSource`: alternate image-source for art direction purpose
+   - `widths`: required widths (array) for the source
+   - `resolutions`: resolutions for the source (array, `widths` has priority)
+   - `sizes`: sizes attribute of the source  (arrays are imploded with ', ')
+- `widths`: required widths (array) for the the default image
+- `resolutions`: resolutions for the default image  (array, `widths` has priority)
+- `sizes`: sizes attribute of the default image (arrays are imploded with ', ')
 - `alt`: alt-attribute for the tag
 - `title`: title attribute for the tag
 
@@ -139,11 +118,7 @@ sources = Neos.Fusion:RawArray {
 
     small = Neos.Fusion:RawArray {
         widths = ${[320,480,800]}
-        sizes = Neos.Fusion:RawArray {
-            small = '(max-width: 320px) 280px'
-            medium = '(max-width: 480px) 440px'
-            large = '100vw'
-        }
+        sizes = '(max-width: 320px) 280px, (max-width: 480px) 440px, 100vw'
         media = 'screen and (max-width: 1599px)'
     }
 
diff --git a/Resources/Private/Fusion/Prototypes/Image.fusion b/Resources/Private/Fusion/Prototypes/Image.fusion
index 7fc9301..ccb2f73 100644
--- a/Resources/Private/Fusion/Prototypes/Image.fusion
+++ b/Resources/Private/Fusion/Prototypes/Image.fusion
@@ -47,8 +47,11 @@ prototype(Sitegeist.Kaleidoscope:Image) < prototype(Neos.Fusion:Component) {
 	renderer = afx`
 		<img @if.has={props.imageSource}
 			src={props.imageSource}
-			srcset={(props.widths || props.sizes) ? props.imageSource.widthSrcset( props.widths ? props.widths : Array.keys(props.sizes) ) : (props.resolutions ? props.imageSource.resolutionSrcset(props.resolutions) : null)}
-			sizes={(props.widths || props.sizes) ? (props.sizes ? Array.join(props.sizes, ', ') : '100vw') : null}
+			srcset={null}
+			srcset.@process.resolutionSrcset={props.resolutions ? props.imageSource.resolutionSrcset(props.resolutions) : value}
+			srcset.@process.widthSrcset={props.widths ? props.imageSource.widthSrcset(props.widths) : value}
+			sizes={props.sizes}
+			sizes.@process.join={Type.isArray(value) ? Array.join(value, ', ') : value}
 			alt={props.alt}
 			title={props.title}
 		/>
diff --git a/Resources/Private/Fusion/Prototypes/Picture.fusion b/Resources/Private/Fusion/Prototypes/Picture.fusion
index b958aa9..b81b542 100644
--- a/Resources/Private/Fusion/Prototypes/Picture.fusion
+++ b/Resources/Private/Fusion/Prototypes/Picture.fusion
@@ -10,11 +10,7 @@ prototype(Sitegeist.Kaleidoscope:Picture) < prototype(Neos.Fusion:Component) {
 				}
 				2 = Neos.Fusion:RawArray {
 					widths = ${[320, 480, 800, 1000]}
-					sizes = Neos.Fusion:RawArray {
-						small = '(max-width: 320px) 280px'
-						medium = '(max-width: 480px) 440px'
-						large = '800px'
-					}
+					sizes = '(max-width: 320px) 280px, (max-width: 480px) 440px, 800px'
 					media = 'screen and (max-width: 1599px)'
 				}
 				3 = Neos.Fusion:RawArray {
@@ -40,26 +36,13 @@ prototype(Sitegeist.Kaleidoscope:Picture) < prototype(Neos.Fusion:Component) {
 		<picture @if.has={props.imageSource}>
 			<Neos.Fusion:Collection collection={props.sources} itemName="source" @children="itemRenderer" @if.has={props.sources}>
 				<source
-					@if.hasResolutions={source.resolutions}
-					@if.hasMedia={source.media}
-					@context.subImageSource={source.imageSource ? source.imageSource : props.imageSource}
-					srcset={subImageSource.resolutionSrcset(source.resolutions)}
-					media={source.media}
-				/>
-				<source
-					@if.hasSizesOrWidth={source.sizes || source.widths}
-					@if.hasMedia={source.media}
 					@context.subImageSource={source.imageSource ? source.imageSource : props.imageSource}
-					srcset={subImageSource.widthSrcset(source.widths ? source.widths : Array.keys(source.sizes))}
-					sizes={source.sizes ? Array.join(source.sizes, ", ") : '100vw'}
 					media={source.media}
-				/>
-				<source
-					@if.hasNeitherSourceNorSize={!source.sizes && !source.resolutions && !source.widths}
-					@if.hasMedia={source.media}
-					@context.subImageSource={source.imageSource ? source.imageSource : props.imageSource}
 					srcset={subImageSource}
-					media={source.media}
+					srcset.@process.resolutionSrcset={source.resolutions ? props.imageSource.resolutionSrcset(source.resolutions) : value}
+					srcset.@process.widthSrcset={source.widths ? props.imageSource.widthSrcset(source.widths) : value}
+					sizes={source.sizes}
+					sizes.@process.join={Type.isArray(value) ? Array.join(value, ', ') : value}
 				/>
 			</Neos.Fusion:Collection>
 			<Sitegeist.Kaleidoscope:Image