Is there a way to make GLOBAL lights color for group of lights and attach it to single SHADER color

Support Lighting and Rendering
1

For example I can make group node and put RGB into it and add this global color to all shaders I need, so in CYCLES I can use NODES for lights and use the same way to change colors globally,
BUT can not do it in EEVEE

Using drivers is a Nightmare, I didn’t found a way to simple add a driver to manipulate colors globally (lights all can be different, ALT+D does not work this way)

So what the idea: one object, one property - color, changing this color - changes every light I need.

2

Solved this in a hard way

3

Why are you using a LIGHT to change the color on the side of the truck?

Have you tried an emissive workflow?
You could select all the dots that represent the Lights ( or add a simple Plane or Filled Circle where the lights are, and either use the Emmisive slot of the Principled or just an emissive shader…

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1 Like
4

The side / edges of the truck has emissive shader, and truck have another lights I wanted to be the same color.

Well I don’t want to click every time on every light source in scene, I have big Icosphere (roof top) and by clicking on it I get an access to rig for global illumination for all the lights I included into the setting.

Because emissive shader does not work as I need. It does not cast shadows, does not work with volumetrics etc.
Only lights do, so, I soved it with drivers, but it wasn’t obvious and simple way, that’s tricky and I don’'t understand why I can’t just copy one color and paste as a driver to another, it was really annoying, because there is only way to use driver in light color socket - repeating process 3 times for every channel. There is no way to connect HSV for example.

5

Emissive shaders do cast shadows and do work with volumetrics? You’ll need to use Cycles for that, but it does work

6

Not sure if it suits your needs, but a script is an option

import bpy 
for light in bpy.data.lights:
    if "YOURNAME" in light.name: 
        light.color =  (1,0,0)
7

Thank you, but I solved already

8

If I would want to use cycles I wouldn’t ask. I need to use EEVEE, but problem is not EEVEE or CYCLES at all, problem is - I have no access to copy-paste drivers to color socket of lights, and I can not use nodes also for lights.
I found a way to use drivers, but it is very wierd way.