Automatic color variation

Often, I use Perlin noise to simply generate uneven coloring. I did this in many 3D apps and find it can serve the same purpose in FF. What I would like to do is have the user pick a color, use that as the "noise", and push the color through X to adjust it's hue / saturation just a bit to give a little contrast. Right now, I've got a filter set up that requires both colors to be picked and that just doesn't sit well with me.

I could create a noise gradient, choose the adjustments that give me a range that I like, then blur the ever lovin' you know what out of it, but the result either isn't a solid color or, if I blur too much, usually not distinctive enough.

Any idea on how to do this in FF?

I was referring to te Noise input on the Perlin control (versus the Background color).

I'd like to be able to make both inputs slight variations of the same color. For example, in my recent coffee stain filter, if I wanted to switch to lemonade, I could choose a single light yellow color. From that one color, a slightly darker yellow would automatically be fed into the background color for a little variance. I'm trying to figure out a way to do that.

Pluging the gradient into the levels you can change the shade or connect some controls to let the user control that. Heres the FF snippet of that same workflow.

color change.ffxml

Ah, now I understand. There are many ways you can achieve this, here's the most obvious: you feed your color into Brightness/Contrast as a source, and map the Brightness input with Perlin noise of desired amplitude:

Note -- the Blend component is needed because the Source input of the Brightness / Contrast component won't accept the color directly from the control component, so I used Blend with the opacity set to 100%.

Then the other one.

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CFandM wrote: Looking at the connections on the other side is still an interesting thing to get used to.

The left-to-right direction is optional, so don't worry, you will be able to turn this off.

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Vladimir Golovin wrote: CFandM wrote: Looking at the connections on the other side is still an interesting thing to get used to. The left-to-right direction is optional, so don't worry, you will be able to turn this off.

I guess this is a quick sneak peek at the new version..

I'd like to create an inner ring that mimics the cup's base, then vary the thickness of where the coffee 'spilled', but that's a bit beyond my abilities and the time I have to play around. For an example, see the main picture of this site - http://www.coffeestaincards.com/

Someday, maybe I'll get it