为保证灯的位置正确设置，阴影不应有太大的改动，我们必须在场景中创建虚拟物体来接受阴影。
Assuming your lights are set up correctly your shadows should work without much alteration, we simply have to place proxy objects in our scene to receive the shadows.
其次，介绍了控制系统网络虚拟实验子系统的构架和虚拟实验实现方法，并为虚拟实验子系统开发了交通灯控制和电机控制两个虚拟实验。
Secondly, the framework and method of virtual experiment subsystem of control system network laboratory is presented. Developed traffic light control and DC motor control are introduced in the detail.
锥形石英灯加热器参数化建模的完成为进一步实现虚拟试验提供了支持。
Parametric design of pyramidal quartz lamp heater will be technical support for virtual test.
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