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Why is emissive color green so much brighter than blue?

I'm using the following material:

alt text

The colors are either full red, full green, or full blue. This is what it looks like:

alt text

To me it really looks like green is more bright, then red, and blue is almost not bright at all. Is that just a visual artifact of human perceptions or is there something i did wrong?

Or is there some trick to compensate for this difference so that all colors will look equally bright and glowing?


Product Version: UE 4.10
material.png (93.3 kB)
colors.png (52.7 kB)
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asked Feb 28 '16 at 12:27 AM in Rendering

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avatar image phoboz Feb 28 '16 at 03:16 AM

Could be camera angle and bloom?

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Hi BramV,

This is the way color works. Red, Green, and Blue all operate on different wavelengths to how these colors are absorbed. Even though they are the same power level, green will appear brighter.

If you're interested in more in-depth information try searching Google to explain why green is brighter to get started.

Thank you!


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answered Feb 29 '16 at 03:48 PM

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Tim Hobson ♦♦ STAFF
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avatar image BramV Mar 02 '16 at 11:13 PM

thanks, for anyone interested, this stackoverflow discussion explains how to deal with this: http://stackoverflow.com/questions/596216/formula-to-determine-brightness-of-rgb-color

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