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I am using Blender 2.91 and a Huion stylus. I set up a simple mesh, with a texture material, and switched to texture paint mode, using the default brush. Everything is working great when I use the mouse, but when I use the stylus it's behaving like an eraser and it's clearing whatever I touch to alpha 0. See video below.

Mouse is painting, stylus is erasing

Larger image. Left screenshot is what I get after left-clicking with the mouse and dragging; right screenshot is stylus-down and dragging.

Mouse is painting, stylus is erasing

What's going on?

Some ideas

Could it be a virtual/button/mapping issue of some sort? Under which condition the same thing would happen when using the mouse? Maybe if a modifier key is pressed?

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  • $\begingroup$ It's pretty hard to make out what's going on from such a small gif. Could you edit in a couple screenshots in instead? Win + Shft + S is a good way to do screenshots on Windows. $\endgroup$ – HISEROD Jan 6 at 16:57
  • $\begingroup$ Thank you, I am going to use Win + Shft + S a lot from now on! $\endgroup$ – damix911 Jan 6 at 18:15
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Even though the poster was having a different problem, one of the answers to another question Painting problem when using pen in Blender seems to do the trick for me. If I change the Preferences > Input > Tablet > Tablet API to Windows Ink then the stylus paints with the selected color.

I have no clue why this is happening though; I will accept any answer that sheds some more light on this issue.

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