一. Reason: max File Explorer which corresponds to the mapping path does not exist, generally this is the use of third-party plug-in import model or material, texture path is a blank column, resulting in the program can not get the correct map, rendering results lost texture.
二. The solution is as follows:
1. Open the max file, the shortcut key "Shift + T" to find missing maps
2. Select the missing texture, right - SetPath ...
3. In the pop-up window, select the path where the texture is located and click OK
4. Save the resubmission on it.