Ocean in a Bottle: Composite a Scene Inside Glass
Place an island photo inside an empty glass bottle on a beach. Fit it with a mask, send it behind the glass and add a soft contact shadow.
Pause at each step and follow the shortcuts on screen. The practice files contain separate source layers; the video is a recorded UI demonstration.
Steps
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Create a document and place the beach
On the start screen click New document (or File > New…, Ctrl+Alt+N). Type 1536 in Width and 1024 in Height, then click Create. Then place 01_BEACH_BACKGROUND.png with File > Place Embedded… and press Enter.

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Soften the background
Choose Filter > Blur > Gaussian Blur…, type 6 in Radius and click OK.

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Place the empty bottle
Choose File > Place Embedded… and pick 03_EMPTY_BOTTLE_ALPHA.png. A box with square handles appears: drag inside it to move, drag a corner handle to resize (the proportions stay the same). Press Enter to finish. Make it large and set it on the sand.

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Place the island behind the glass
Choose File > Place Embedded… and pick 02_ISLAND_INSERT.png. A box with square handles appears: drag inside it to move, drag a corner handle to resize (the proportions stay the same). Press Enter to finish. Scale it to the inside of the bottle. Press Ctrl+[ (Layer > Arrange > Send Backward) to put it behind the bottle.

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Show the island only inside the glass
Press M for the Rectangular Marquee and drag a rectangle just inside the glass. Click the Add mask button at the bottom of the Layers panel (a rectangle with a circle inside). Press Ctrl+D.

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Add a contact shadow
Click the beach layer and click the Create a new layer button (the square with a plus sign) at the bottom of the Layers panel. Press Shift+M for the Elliptical Marquee and drag a flat ellipse under the bottle. Click the top color square at the bottom of the toolbar on the left (Foreground color). Type 3A2A1A in the # box and click OK. Press Alt+Backspace, then Ctrl+D. Choose Filter > Blur > Gaussian Blur…, type 14 in Radius and click OK. Type 60 in the Opacity box at the top right of the Layers panel and press Enter.

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Compare before and after
Click the eye icons at the left of the layers to turn them off and on and compare before and after.

If a browser shortcut takes over, use the matching editor menu command. Keep the source files and practice on a copy.
Questions
Do I need Photoshop for this tutorial?
No. Every step is done in PhotoVim in your browser, with nothing to install. Menu names and shortcuts follow Photoshop, so the steps look familiar if you already use it.
Why use a mask instead of clipping to the bottle?
The bottle is transparent in the middle, so clipping would show the island only on the glass edges. A mask shaped like the inside of the bottle keeps the island inside.





