-If, on the other hand, you are using Nageru 1.9.1 or older (or just wish
-for more manual control), there's an entry point you will need to implement::
-
- function set_wb(channel, red, green, blue)
-
-When the user picks a gray point, this function
-function will be called (with the RGB values in linear light—not sRGB!),
-and the theme can then use it to adjust the white balance for that channel.
-The typical way to to this is to have a *WhiteBalanceEffect* on each input
-and set its “neutral_color” parameter using the “set_vec3” function.
-