Introducing the Sandpaper Rub, the worlds-first RGBA eraser!!
Add universal RGBA to any brushstroke.
You can also flatten paint that you have thickened.
Using filters to make paint look 3D is nothing new e.g. emboss and heightmaps. However! I find these more convenient. They also give you better control, and who doesn’t want more of that in life✨
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How to Use
Think of them like precision filters -
Paint as you would normally
Use a toolkit brush on top to add RGBA
“Sandpaper Rub” works like any other eraser!
They are also experimental - especially the paint flatten effect. Your mileage may vary
(ノ゜▽゜)ノ
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Extra Notes
I think the eraser is a unique solution for having a brush that can be affected by the texture of your brushstrokes. In this case, through the filter engine via edge-detection. It’s not perfect, but it’s certainly interesting (to me anyway) xD
(Click on image for full resolution to see thickening effect)
As for adding universal RGBA, I think the “height” one has the most realistic result, although its subtle. Lock transparency with that brush!
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Credits
In the example above, I used “Wet Large Old Brush” from @clooms “Dry & Dirty” Bundle, which I think is absolutely fantastic for traditional effects!
The brush used to demonstrate “Sandpaper Rub” is Memileo’s lovely impastos, WIP version.
In the poster, I used “Dra) Acrylic; Brush - Basic” from here.
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Thank you for reading (´｡• ᵕ •｡`) I thought it might be nice to put together something small as I work on Metallics 2.0 and Acrylics, even if these are specialised. Still, I hope you enjoy!
This is as good a place as any to say that your innovations are a tremendous value-add to Krita and have become an integral part of my workflow, thank you. I look forward to trying these out.
Thanks for these, the push & pull of the thickening etc seems very interesting!
Used them over this sketch I made with Memilio brushes (the small set not light or performance iirc)
That is gorgeous!!! This is exactly the kind of things I was hoping to see, thank you for sharing🔥May I add this to my ko-fi gallery? (with credits*) I struggled to find a good way of demonstrating the effect and that mug does it really well xD
(Since your profile is set to hidden, I didn’t add a direct link to you in the credits! DM me if you have a link for me to add, or would like anything changed \╭◜◝ ᵕ ◜◝╮/)
I’m never quite sure what the settings mean, I guess you guys logged in can see my profile here but it won’t show from a random Google search or to someone not logged in?
Anyway, will be sure to post more with these next week, cheers.
I’m not 100% sure on that one either, all I know is that if I click your portfolio - it is hidden! Right now I think you can see it and no one else, but sometimes people leave it “unhidden” so other Krita forum users can see their portfolio/recent activity.
Theres no right or wrong setting but I hope that helps xD and I look forward to it! Have a lovely evening✨
Features 
How to Use 
Extra Notes 
Credits 
Download Here!
Thank you Litmus, your message made my morning today!
- here’s the pre-Toolkit version for reference: