What is .D3D file extension?
3D model file used by Game Maker, an application used to develop 2D and 3D games; stores a model mesh, which can be texturized; used for loading game objects, such as buildings, monsters, and items.
Game Maker only supports 3D models in the Pro version.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.