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Open a new transparent image 1000 x 650
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Pick from your tube a dark color as foregroundcolor and a bright color as backgroundcolor
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Fill the image with this gradient (sunburst)

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Selectiontool freehand - point tot point  and select as here

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Selections - modify - feather 3
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Hit the delete button twice
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Selections - select none
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Effects - plugins - Flaming Pear - Flexify 2

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Selectiontool warp brush with these settings

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Place the cursor in the middle of the image and press the left mouse button to get this

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Adjust - add/remove noise - add noise

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Adjust - sharpness - sharpen more
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With the magic wand select the transparent area on top
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Selections - modify - expand 21 pixels
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Layers - new raster layer
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Layer - arrange - move down
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Fill the selection with this gradient (linear)

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Layers - new raster layer
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Fill the selection with the patern "geometric" with these settings

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Effects - plugins - Balder Olrik - Select Sharp

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Effects - 3D effects - drop shadow - V 2 / H 2 / 65 / 4 / black
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Adjust - sharpness - sharpen
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Blend mode on lumination or own choice
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Activate the layer with the flexify effect
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Effects - 3D effects - drop shadow - V12 / H 8 / 65 / 25.74 / black
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Repeat with V -12 / H -8
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Layers - load/save mask / load mask from disc "Marge_TopFade"
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Layers - merge - merge group
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Repeat the mask twice
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Image - canvas size

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Layers - new raster layer
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Layers - arrange - send to bottom
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Fill the layer with this gradient (linear)

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Adjust - add/remove noise - add noise - same settings as before but with noise 7
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Effects - plugins - Layout Tools - Contrast Checkers

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Effects - plugins - Mura's Meister - Perspective Tiling

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Adjust - sharpness - sharpen more
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Hide the 3 layers on top and stay on the layer at the bottom (the layer with the perspective effect)
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With the magic wand select the transparent area at the top
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Selections - modify - expand 13
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Selections - modify - inside/outside feather 20 / both sides
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Hit the delete button twice
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Selections - select none
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Layers - new raster layer
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Selection tool (S) - custom selection

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Fill the selection with this gradient (sunburst)

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Layers - new raster layer
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Copy your landscape tube and paste into selection
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Selections - select none
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Blend mode on hard light or own choice
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Adjust - sharpness - sharpen more
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Activate the layer with the sunburst gradient
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Layers - arrange - move down
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Image - canvas size

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Activate the layer with the perspective tiling effect
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Layers - load/save mask / load mask from disc "Marge_TopFade"
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Layers - merge - merge group
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Repeat the mask twice
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Layers - new raster layer
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Layers - arrange - send to bottom
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Fill the layer with a color from your image
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Turn back the visibility of the 3 layers on top
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Activate the layer on top
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Copy your tube and paste as a new layer
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Drop shadow your choice
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Layers - merge - merge all
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Add your watermark
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Save as jpg

Ready!