Stencil mode doesn't draw a texture in texture paint?

Question

Firstly, I imported a ply mesh to Blender 3.3.0 and colored it by attribute. I selected place in edit mode, where I wanted to draw the texture and created Smart UV Project. Then, I followed by many tutorials and blocked in one moment. I try to draw a texture in stencil mode but it doesn't work in Texture paint interaction mode, but it works on the paint mode.

It's my settings

Final effect

Link to blender project: https://we.tl/t-YinVxn7WUf

I guess this question is a duplicate. The problem is that you're trying to paint on the backface which doesn't work. If you turn on the Face Orientation overlay (https://blender.stackexchange.com/a/216140/107598) you will see most of the inside of the room is red. Red=back side, blue=front side. Your 3D scanned(?) mesh is very heavy and I don't know if you can flip the faces easily (there are so many). So it might be easier to just mirror the texture. Set Brush > Texture > Size X to -1 in the Brush/Tool settings. Then paint it from the outside on the wall. — Blunder, Nov 28 '22 at 11:52

score 1 · Answer 1 · edited Dec 07 '22 at 02:24

I guess this question is a duplicate. The problem is that you're trying to paint on the backface which doesn't work. If you turn on the Face Orientation overlay (display face normal direction in blender 2.8) you will see most of the inside of the room is red. Red=back side, blue=front side. Your 3D scanned(?) mesh is very heavy and I don't know if you can flip the faces easily (there are so many). So it might be easier to just mirror the texture. Set Brush > Texture > Size X to $-1$ in the Brush/Tool settings. Then paint it from the outside on the wall. – Blunder

In addition, if someone wants to change orientation, you must be in Edit mode > Mesh > Normals (shortcut: Alt+N) > Flip.

Stencil mode doesn't draw a texture in texture paint?

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