In fact, photogrammetry, a technology that uses photos to generate 3D models, is an old technology with a history of nearly 200 years. It mainly relies on multiple photos and videos taken by the camera to calculate the shape, size and spatial position of the target object. Nowadays, with the help of the huge computing power of computers, many software programs can directly read the object data in the photo and generate a 3D model.

SpeedTree (AKA: SpeedTree Modeler) is a professional, award-winning and industry-leading 3D trees modeling software suite developed by IDV. It allows user to model, texture and animate both stylized and photorealistic vegetations for VFX, Arch/Viz (architectural visualization), or matte paintings. At present, it is widely used in film, game, animation, military simulation, landscape design and other fields to help designers and workers more easily and efficiently complete their works.

Google SketchUp is an extremely popular and user-friendly 3D modeling tool, which is production process of design scheme oriented, and mainly used in the architectural design and relevant fields. Its creation process not only can directly express the designer's idea, also fully meet the needs of communicating with customers in time. Applying it to game design is a relatively new field with a certain amount of challenges.