To work around this I'll usually manually add a few intermediate colour stops or a custom gradient texture to have the colours be less... gross. Yet to try it (there's no UE version as of right now) but mixbox looks like it will give a far more satisfying/intuitive colour lerp *automatically* - ThreadSky

timoxley.bsky.social • 61 days ago

To work around this I'll usually manually add a few intermediate colour stops or a custom gradient texture to have the colours be less... gross.

Yet to try it (there's no UE version as of right now) but mixbox looks like it will give a far more satisfying/intuitive colour lerp *automatically*

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manadono.bsky.social•61 days ago

now that you mention it maybe this is why the lerp3color node was made, but how do you personally go about lerping through multi colours? I try abd think about it sometimes for like rainbow spinners and my brain cannot fathom 🙁

jessymeow.bsky.social•61 days ago

Are you two familiar with https://www.yorku.ca/eye/handj.htm ? To interpolate color well, it's necessary (but nobody does this) to interpolate multiple wavelengths and amplitudes. Color spaces are only useful for conversion afterward. I skimmed the video; it seems like Mixbox is sort of on the right track?

timoxley.bsky.social•61 days ago

not familiar with that but thanks for the reference!

timoxley.bsky.social•61 days ago

3ColorBlend node helps but still never looks very good between the stops. You can add a "Curve Linear Color" object & grab the color from a curve asset where you can see the gradient and add additional color stops visually. You can then read the curve from BP & pass to the material as a parameter

timoxley.bsky.social•61 days ago

There's probably a way to read the curve from the material directly, but since I'll usually be driving the material's color lerp amount from BP anyway e.g. from a widget's tick, you can read the color from the curve at the same point you're passing in that lerp amount.

timoxley.bsky.social•61 days ago

Alternatively you can make a 1xN pixel texture & do a UV lookup using the same 0-1 parameter you'd be using for your color lerp. Textures can be easier to manipulate en masse by artists in their editor of choice e.g. color grade the entire UI by applying the same color transform to each texture.

timoxley.bsky.social•61 days ago

The mixbox talk is actually a really good intro to some basic colour theory, very clear explanations, highly recommend watching https://www.youtube.com/watch?v=_qa5iWdfNKg

e.g. I'd never thought about "pigment colour is just subsurface scattering" but of course it is!

timoxley.bsky.social•61 days ago

Here's a version that works in #unrealengine for you to play around with.

https://blueprintue.com/blueprint/hp_h_hu1/

Mind the mixbox licensing is only free for non-commercial.

timoxley.bsky.social•57 days ago

I reached out to them about licensing for indie games and they promptly responded with permission to use freely, at least until the game is making decent revenue, which sounded reasonable to me. I think they're after the big Adobe/Google money, rather than squeezing struggling indie studios.

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