This effect is only applicable in Lighting Mode 1. Click on the menu in the upper left corner, select "Rendering" ->"Light Penetration" to turn it on
The lighting and shadow effects of the model will be improved when turned on.
If the transparency texturemap displays abnormally after turn on, select the model in the "Model List", click on the "Material Editor", select the material with the problem, and uncheck the "Light Penetration" option.