I was wondering what other people thought about this idea.

A layer mode that creates and blends the complimentary color of the colors
from the layer underneath it. If you change the color of the layer underneath
it will dynamically adjust.

You could use grays scale colors to adjust the intensity of the mix (In other words the effect for this layer would only work if you paint using grayscale colors.)

So, If I had a bottom layer with blue painted on it and I create a new layer and set it to the proposed mode; then painted some different grayscale tones on it; It would create different intensities of a blend with orange.

If I then decide to change the lower layer to red; the proposed layer would dynamically adjust and appear blended with green.

The idea is to create a dynamic shading layer that uses the blend of the complimentary colors for a shaded effect.

This could be useful if you had a painting with lots of colors and shaded areas; you could completely change colors and add gradients without worrying about the shading.

Yea I know my reason for it being helpful sounds kind of weak, but what do others think about this idea.

If you add a filter mask with an invert filter that should do what you descibed, I think

Was trying out the different effect layers to try and generate the effect and one thing to note is that the constant resizing of the window every time I click on a different effect is annoying and the names of some of the effects are cut off with no way to resize the view of the name.

While the invert effect does create the complimentary color, it does not create a blend of the colors that is useful for shadow and to create the complementary color from the invert filter requires me to use the right color to invert to. If it was just a layer where I used grayscale colors I could do the shading in grayscale on a layer and not worry about picking the right colors to invert.

Ex. If I have blue on the bottom layer, I don't want to see orange on the top layer, but instead a mixture of blue and orange that is useful for shading.

I really don't know if this effect makes sense to anyone, but I thought I would just throw the idea out there.

great job on krita

Is there a way I can access a full grayscale color wheel in RGB mode?


edit: I found it! The more I explore the more I find.

Oh? Something like a "map colour gradient to greyscale" feature? It's something I would like to have, too! There'd be pros and cons to both proposals:

Your proposal:
Pros: On just one layer you can apply all sorts of colours and the shading will be done automatically.
Cons: Lack of control over the colours. In pictures, shading is often not just a colour and its complementary, it's influenced by things like ambient lighting, tonal variations etc.

My proposal:
Pros: Control over the spectrum.
Cons: Mostly an interface one: how does applying a gradient to a layer (part?) look like? If you use a filter to colourise a layer, then you can't adjust things as easily once the colours are applied. Unless it's an "adjustment layer" type of thing, an alpha channel-type layer with a gradient attached to it. How useful would it be though?

Well, I guess it would have to be a filter instead of a layer mode so you can have options to change the types of blending.

As for things like reflections, I guess we have to handle them on a diff layer.

I'll put my thinking cap on.