2. Secondly, open the folder under the project file in the file and look for the missing files one by one. If a file also shows the same color grid as above, it is a missing file.
3, and then select the material, right-click to find and click-display the layer source in the project.
4. Right-click on the material, find the replacement material file in turn, find the material to be replaced, and import it.
5. Finally find the materials, and the remaining lost archive materials will be found, and the template can be used. Remember to save it in case it is opened or lost next time.