Ghost Mannequin and neck join services are commonly used in the fashion industry to create a realistic 3D effect of clothing items. This technique involves removing the mannequin or model from the image and replacing it with a clean, invisible mannequin, so the clothing item appears to be floating on its own. The neck join service is an additional step that involves blending the neck area of the clothing item with the neck area of the invisible mannequin, creating a seamless and natural appearance.
To perform these services in Photoshop, follow these steps:

1. Open the image you want to edit in Photoshop.

1. Create a new layer and use the pen tool to carefully trace around the outline of the clothing item, creating a clipping path.

1. Once you have completed the clipping path, select the layer containing the original image and remove the background, leaving only the clothing item visible.

1. Duplicate the layer with the clipped clothing item and hide the original layer.

1. With the duplicated layer selected, go to Edit > Transform > Warp to adjust the shape of the clothing item, so it appears to be floating on its own.

1. Use the Clone Stamp tool to remove any visible parts of the mannequin or model from the image.

1. Once you have created a clean, invisible mannequin, bring the original layer back into view and use the neck join technique to blend the neck area of the clothing item with the neck area of the invisible mannequin.

1. Finally, adjust the brightness, contrast, and colors of the image to create a professional and polished look.