I hello, I make tutorials about Blender 3d and was just getting to know Krita but ran into a problem. How could this be done?

I ran into this super cool video about Frequency Separation Retouching in Photoshop and was wondering how you do this is Krita? I can't seem to figure out how to subtract one layer from the next in the layers tool. I would not think this should be done by brush.

https://www.youtube.com/watch?v=ldhG9fmgC7o

Thanks

If it's not in G'MIC it can't be done in Krita. Our filters are focused on digital illustration.

You are completely missing the point. I want to know how it can be done. Just because someone draws hair on a photo does not mean that krita should avoid all tools having to do with drawing hair. I want to know how to subtract one layer from the next and save the results on a 3rd.
Thanks.

We don't have advanced specific feature for this, but you can make something similar in krita if you put the layer with blur on top of a layer without blur, use Grain extract blending mode on it and merge with layer below (of course you need an extra copy of the layer with blur compared to the method in the video...).

We don't have advanced specific feature for this, but you can make something similar in krita if you put the layer with blur on top of a layer without blur, use Grain extract blending mode on it and merge with layer below (of course you need an extra copy of the layer with blur compared to the method in the video...).

But we do have subtract in the layers tool as one of the settings. We can of course copy a layer and blur it. What I don't get is how to use this subtract in the layer tool and which layer is subtracted from which or am I completely not getting krita in this case?

Thanks!

Yes of course we have a substract blending mode, but this one really does a substraction. The feature shown in the video link, while called substract, doesn't exactly do a simple substraction, as it uses other parameters.

So the closest blending mode to perform such thing is to use grain extract as I explained (on blurred layer above normal layer, and merge them). And then use grain merge mode for the result over another copy of the blurred layer.