increasing the level of realism. For motion that is too dangerous for performance capture, there are computer simulations that automatically calculate physics of motion and resistance with skeletal frames. Virtual anatomy properties such as weight of limbs, muscle reaction, bone strength, and joint constraints may be added for realistic bouncing, buckling, fracture, and tumbling effects known as virtual stunts. However, there are other applications of virtual anatomy simulations such as military and emergency response. Virtual soldiers, rescue workers, patients, passengers, and pedestrians can be used for training, virtual engineering and virtual testing of equipment. Virtual anatomy technology may be combined with artificial intelligence for further enhancement of animation and simulation technology. See also 3D computer graphics Morph target animation Interactive skeleton-driven simulation Cutout animation References Computer animation Computer graphic techniques 3D computer graphics Animation techniques Anatomical simulation