Particle system hair lines are facing downwards. How to make them facing upwards? I was creating a doughnut following a famous Blender tutorial on YouTube. I duplicated the upper part of a Torus and made them into a separate object. At this point, when I added a particle system (hair), the hair lines were facing up.

Then, I deformed the object using the sculpting mode. At this point, if I add a particle system, the hair lines look like below; they are facing downwards. I have searched Google and found answers and posts about moving the origin, but it did not work. Is moving the origin the answer? I am using Blender 2.81.



The project file can be downloaded from this URL: https://filebin.net/pyj0vqo1787i4y1r/test.blend?t=uco3o5we
It seems like a Normal problem. Particles have a reference direction based on the poly surface. Try to flip your normals as you rather a hairy doughnut than a bearded one. This is a good article: https://www.katsbits.com/codex/flip-normals/