how to get this kind of gradient?

[maxpuliero]

Hi guys,

I wonder if any of you know how to get this kind of  RGB gradient inside substance designer.
thank you

Max

[Cyril Dellenbach · Accepted solution]

Hello @maxpuliero,

Thanks for the question.

When using the Gradient Map node, you can select all the RGB spectrum with one simple technique,

And if you want to add the Luminosity, you'll have to blend a second dimension, so a second gradient.

 You'll find attached to this message the graph used as example.

Best regards,

[maxpuliero]

thank you for the reply, 

I was hoping for something more mathematically accurate, but I guess this will work,

[Ralph5C3A · Accepted solution]

Alternatively, the Pixel Processor can give you a more accurate result: