An additional layer of complexity is added, however, in making these models move and change over time. Often, animators create models in specialized applications and then load these models into different animation tools.

• 使模型随时间发生移动和改变增加了新的复杂性，动画家常在专门的应用程序中创建模型，再将这些模型加载到不同的动画工具中。