Interpolated hair curves sharp turns
Open, ConfirmedPublic

Description

System Information
Windows 10
Geforce 970
32 Gigabytes ram

Blender Version
2.79

Short description of error
As shown in the screenshot below, some of the hairs seemingly at random have their curves restart mid stroke, leading to a perfectly straight line connecting from one side of the wave to the other where it continues as a curve.

This happens on hair systems using interpolated children and either braid or spiral kink.

Exact steps for others to reproduce the error
Add Hair system, Up the number of steps to 7
Display 7 steps
Set children to Interpolated
Set Kink to Braid
Amplitude 0.663
Frequency 1.507

The error occurs at any Amplitude/Frequency

Details

Type
Bug
Philipp Oeser (lichtwerk) triaged this task as Confirmed priority.Jun 13 2018, 3:40 PM
Philipp Oeser (lichtwerk) claimed this task.

Can confirm this.

Looking at this part of the code, there might be something to prevent the sudden jump, but needs further investigation. Claiming for now, but might end up passing this on to @Lukas Toenne (lukastoenne) if I fail...