The porn video tag "lara-croft-3d" refers to a specific type of adult content featuring the popular video game character Lara Croft, who is known for her appearances in the Tomb Raider series. This tag indicates that the scene or video involves 3D animation or rendering, making it visually engaging and immersive. The combination of Lara Croft's iconic appearance and the 3D technology used to create the imagery is meant to provide a unique and enticing experience for viewers who enjoy this particular style of adult content.