We have a simple hair system on a sphere with thick strands. The shape of the hair should be cylindrical, it looks correct in viewport renders, but full renders are changing the hair shape. What is going on here? The stack is fine, subsurf 1/1 then hair. scales/rotations applied, no doubles…
No bugs, it’s the Step parameter. There is both Render and Display Step parameter. The more steps, the more resolution the hair has, so it will be more cylinder and less sharp pencil-like
Your Step render setting is = 3. Your Display (viewport) is = 6. That’s why the difference