The tag "blender-3d" refers to a specific type of adult content that utilizes 3D rendering and animation software called Blender. Blender is a popular free and open-source 3D creation suite used by professionals in various fields, including the adult industry. The tag indicates that the video features computer-generated, 3D rendered, or animated scenes involving adult content. These scenes might include 3D models of human figures engaging in sexual activities, often with highly detailed visuals and settings. This type of content is popular among viewers who appreciate the artistry, creativity, and technical aspects involved in producing these animated scenes.