For most users, the recommended path is to use for extraction, then bring the asset into Blender with the Sollumz plugin for editing and final OBJ export.
The converter reads the binary or text-based YDD file, interpreting its custom geometry structure—vertices, faces, normals, texture coordinates, and any hierarchy data. ydd to obj converter work
If you are looking for a reliable way to start converting, I recommend exploring the GIMS EVO plugin for 3ds Max or using OpenIV to export assets for conversion. For most users, the recommended path is to
Change how the model looks, then re-import it back into the game engine. How Does a YDD to OBJ Converter Work? For most users