What is pmd file?

A PMD file is a file format associated with the PMD model, which is primarily used in 3D modeling and animation, particularly within the MikuMikuDance (MMD) software. It contains 3D model data, including geometry, textures, and bone structures, allowing users to animate and manipulate characters. PMD files are often used in the creation of fan-made animations and models, especially in the Vocaloid and anime communities.