Panel Backlight and multiplier control?

[firewill]

Hi, all

 

I've post question about cockpit lighs here before, with the help of answer I've get warning light and flood light working properly, it's panel backlight this time:

 

1. How do you apply backlight? I've try alpha channel with transparent_self_ilum material, they didn't work as I expected, any detail work flow in 3dmax on this please?

 

2. This's relate to question 1, How to control multiplier of backlight? Arg float to multipiler on flood light is easy to understand, what should I do for backlight?

 

3. And how do you change the color of backlight? They are just plain white as on diffuse texture.

 

Thanks for help!