Grease pencil draw mode creates new strokes to camera origin when using Mesh/Plane converted to GP #80569

New Issue

Dantti · 2020-09-07T16:55:54+02:00

Dantti commented

2020-09-07 16:55:54 +02:00

Blender Version
Broken: version: 2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: 0330d1af29
Worked: new feature, wasn't on 2.83

Short description of error
In grease pencil: drawing on a converted mesh/plane creates new strokes to camera origin.
Also, if you delete everything on the converted mesh/plane Gp object and try to draw, new stroke is found on camera origin.
Not sure if this happens on other mesh conversions. Plane is the one it happens for sure. Found this by accident.
Please see the video.

Exact steps for others to reproduce the error
Start with 2D animation preset
Go to object mode
Create a mesh / plane
Rotate it 90 degrees X axis
Convert mesh to grease pencil
Change to camera view
Go to draw mode
Change material to stroke
Try to draw on the converted plane
Stroke is now found on camera origin as a dot.
This happens when you are viewing from the camera and when stroke placement is set to Origin / 3D cursor.
Also happens in front orthographic view > sometimes the stroke disappears or is found at the camera origin.
Also happens if you delete all the points of the converted GP object and try to draw from scratch.
If you have surface / stroke it seems to be ok.

GP_Stroke_to_camera_origin.mp4

**Blender Version** Broken: version: 2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: `0330d1af29` Worked: new feature, wasn't on 2.83 **Short description of error** In grease pencil: drawing on a converted mesh/plane creates new strokes to camera origin. Also, if you delete everything on the converted mesh/plane Gp object and try to draw, new stroke is found on camera origin. Not sure if this happens on other mesh conversions. Plane is the one it happens for sure. Found this by accident. Please see the video. **Exact steps for others to reproduce the error** Start with 2D animation preset Go to object mode Create a mesh / plane Rotate it 90 degrees X axis Convert mesh to grease pencil Change to camera view Go to draw mode Change material to stroke Try to draw on the converted plane Stroke is now found on camera origin as a dot. This happens when you are viewing from the camera and when stroke placement is set to Origin / 3D cursor. Also happens in front orthographic view > sometimes the stroke disappears or is found at the camera origin. Also happens if you delete all the points of the converted GP object and try to draw from scratch. If you have surface / stroke it seems to be ok. [GP_Stroke_to_camera_origin.mp4](https://archive.blender.org/developer/F8850935/GP_Stroke_to_camera_origin.mp4)

Dantti commented

2020-09-07 16:55:54 +02:00

Added subscriber: @Dantti

Antonio Vazquez commented

2020-09-09 15:57:12 +02:00

Added subscriber: @antoniov

Antonio Vazquez commented

2020-09-09 15:57:12 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Antonio Vazquez commented

2020-09-09 15:57:12 +02:00

Can you try to apply transformations to the new GPencil objects before drawing? Also, why don't use View for the Drawing plane?

Can you try to apply transformations to the new GPencil objects before drawing? Also, why don't use View for the Drawing plane? ![image.png](https://archive.blender.org/developer/F8858088/image.png)

Dantti commented

2020-09-09 19:46:48 +02:00

Oh. Didn't notice the drawing plane was set to front by default.
Im sorry.
Beveling plane verticies got me this shape faster and I was baffled when I couldn't draw on it straight away.

Is there a possibility to make the drawing plane set to view by default when the conversion has been made? It would make more sense especially with this kind of use case. Just a thought :)

Oh. Didn't notice the drawing plane was set to front by default. Im sorry. Beveling plane verticies got me this shape faster and I was baffled when I couldn't draw on it straight away. ![shape.png](https://archive.blender.org/developer/F8858698/shape.png) Is there a possibility to make the drawing plane set to view by default when the conversion has been made? It would make more sense especially with this kind of use case. Just a thought :)

Antonio Vazquez commented

2020-09-10 15:59:00 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Antonio Vazquez closed this issue

2020-09-10 15:59:00 +02:00

Antonio Vazquez self-assigned this 2020-09-10 15:59:00 +02:00

Antonio Vazquez commented

2020-09-10 15:59:00 +02:00

@Dantti You could set the view plane as your request, but this might be logical for you, but it may not be for other users, so we cannot implement this kind of thing.

Thanks for the report, but as this is not a bug, I'm going to close the report. If you have more problem, please open a new report.

@Dantti You could set the view plane as your request, but this might be logical for you, but it may not be for other users, so we cannot implement this kind of thing. Thanks for the report, but as this is not a bug, I'm going to close the report. If you have more problem, please open a new report.

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Grease pencil draw mode creates new strokes to camera origin when using Mesh/Plane converted to GP #80569