hair shape changes when rendered.

After creating with particle hair, it is output with cycle render, but the result will change after preview and after render. What are the possible causes?
The number of strand steps and render steps in the viewport display are the same.

Image left is cycle render output
The right side of the image is the cycle preview in the 3D viewport.

I understood the cause. The subdivision modifier render and viewport numbers were misaligned.

[image]