Can't use texture draw on the Donut I'm following the Blender Guru's tutorial Donut series. After completing the modelling part and sculpting I noticed that I had more then one millions of polygons, so I reduce it with using Decimate modifier. After that I can't  Texture Paint on the mesh. There are some lines and  when I try to draw on that part the lines appear on the hall area.
The link of my Blender file  https://blend-exchange.giantcowfilms.com/b/oswV69WD/
Your unwrap was probably bad, you must have had faces overlapping in your UVmap, I've redone it:

Select the whole mesh in Edit mode, switch to Face Select mode, select one last face to make it active, press U (Unwrap) &gt; Follow Active Quads:



Paint: