GPencil: Strokes go missing after Interpolation from another layer #78042

New Issue

Samuel Bernou · 2020-06-19T18:24:43+02:00

Samuel Bernou commented

2020-06-19 18:24:43 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.87

Blender Version
Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: 211b6c29f7
Worked: (newest version of Blender that worked as expected)

Short description of error
2D Animation in Grease Pencil.
When interpolating in between two keys from a layer X, some images/strokes from another layer Y just disappear.

When modifying the key on which the image disappear (delete some points or add some strokes) and then redo the process of interpolation (from a different layer X ), the image that was disappearing still disappear BUT the new strokes stays.
See video attached.

If we successfully isolated the key affected by the disappearing, we do not know why it affected this one in particular and strangely enough we could safely isolate it from the other keys (move it around the timeline) without changing the disappearance.

Exact steps for others to reproduce the error

Open attached .blend file
Interpolate in between the 2 keys of the 'to_interpolate' layer
Image on the "do_not-touch" layer should disappear

Thanks for your help.
bug_GP_disappear_on_interpolate.blend

video_bug_GP_disappear.mp4

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.87 **Blender Version** Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: `211b6c29f7` Worked: (newest version of Blender that worked as expected) **Short description of error** 2D Animation in Grease Pencil. When interpolating in between two keys from a layer X, some images/strokes from another layer Y just disappear. When modifying the key on which the image disappear (delete some points or add some strokes) and then redo the process of interpolation (from a different layer X ), the image that was disappearing still disappear BUT the new strokes stays. See video attached. If we successfully isolated the key affected by the disappearing, we do not know why it affected this one in particular and strangely enough we could safely isolate it from the other keys (move it around the timeline) without changing the disappearance. **Exact steps for others to reproduce the error** - Open attached .blend file - Interpolate in between the 2 keys of the 'to_interpolate' layer - Image on the "do_not-touch" layer should disappear Thanks for your help. [bug_GP_disappear_on_interpolate.blend](https://archive.blender.org/developer/F8632284/bug_GP_disappear_on_interpolate.blend) [video_bug_GP_disappear.mp4](https://archive.blender.org/developer/F8632283/video_bug_GP_disappear.mp4)

Samuel Bernou commented

2020-06-19 18:24:43 +02:00

Added subscriber: @Pullup

Antonio Vazquez self-assigned this 2020-06-19 19:19:08 +02:00

Antonio Vazquez changed title from ~~Grease Pencil Strokes go missing after Interpolation from another layer~~ to GPencil: Strokes go missing after Interpolation from another layer

2020-06-19 19:19:23 +02:00

Antonio Vazquez commented

2020-06-19 19:21:19 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'