Here's the result we're trying to achieve: So, let's get started!
These are the two images we'll be using:
- Open the image of the wine glass.
- Create a new layer and move this new layer below the wine glass image. (This layer will keep the document size the same during any subsequent manipulations.)
- Add a background of your choice to the new bottom layer.
- Make the wine glass layer the active layer and create a mask to separate the wine glass from its background. In this case, I first used the AutoMask tool and then painted on the mask to fine-tune it. (It's important to get a great mask around the cup area because this mask will be used twice.)
- Create a Color to Transparency adjustment layer for the wine glass to eliminate the original background colour from the glass. In this case, the colour I removed was white. Adjust the CtT settings so that the original background colour is removed, but the blacks and greys are retained.
- Import your photo of the people as a layer, and move it below the wine glass layer; adjusting the photo's size and position so the people are nicely centered in the cup of the glass.
- When things are looking good, it's a good idea to bring that photo layer to document size.
- Duplicate the wine glass layer mask, and move the duplicate onto the people photo as a (child) mask.
- If your photo is extending into the stem of the wine glass, paint on the people photo mask with black to hide the stem area of the mask.
- I added a mask to the CtT adjustment layer and painted with a large, very soft brush at 5% with black to lessen the transparency effect around the edges of the cup area so that the shape would appear more rounded. I also painted some black on the stem to lessen its transparency and make it appear brighter.
- I added a Histogram adjustment layer as a child of the wine glass and moved the black point and gamma sliders to give the wine glass a little more sparkle.