Anyone know how to edit glass window in Zmodeler so that it shows the computer screen illuminated? Currently when I close the door, the window seems to block any of the lights from inside the car (the laptop screen looks dark, the controls on the siren are also dark. IT's not until I open the door that the lights are visible again. I keep checking under properties and Material. But not sure which one to select in the list.

You can fix this with using any trainer. But its just for this car. If you spawn again its will be tinted black.

Or you can fix this in vehicle.meta file. Every car has Glass Tint id.

1. If you wanna fix it in zModeller
2. Select the your lightbar or others.
3. And go to Properties from Hierarchy 
4. And then Mesh/Vertices/Format
5. Unselect Tangents / Select Secondary Color
6. Make UV Channel 2 and Open Vertex Mode
7. Select all of the model go Surface/Paint
8. From here top left on paint segment there is square button.
9. Click it and make Channel A
10. And same go to Color Tool and click top left button make the Color Black
11. And Click the Fill Selected. 
12. Thats it! 
13. Unselect everything. And export car. Try in the game.

(Sorry for my bad english

There is screenshots for helping better.)