GPencil: Object without materials cannot use Vertex Color mode #77067

New Issue

Mal Duffin · 2020-05-25T23:53:40+02:00

Mal Duffin commented

2020-05-25 23:53:40 +02:00

System Information
Operating system: Windows 10
Graphics card: NVidia GTX1070

Blender Version
Broken: 2.83 Beta, 39aa122a0e, master, 2020-05-25

Short description of error

Exact steps for others to reproduce the error

In Object mode, add a new Grease Pencil Empty.
Go to Draw mode
The vertex color option isn't there.

NOTE: It is there if you add a new Grease Pencil Stroke or Monkey object.

With GP Empty

With GP Stroke or Monkey

**System Information** Operating system: Windows 10 Graphics card: NVidia GTX1070 **Blender Version** Broken: 2.83 Beta, 39aa122a0e6d, master, 2020-05-25 **Short description of error** **Exact steps for others to reproduce the error** - In Object mode, add a new Grease Pencil Empty. - Go to Draw mode - The vertex color option isn't there. NOTE: It is there if you add a new Grease Pencil Stroke or Monkey object. With GP Empty ![image.png](https://archive.blender.org/developer/F8554119/image.png) With GP Stroke or Monkey ![image.png](https://archive.blender.org/developer/F8554117/image.png)

Mal Duffin commented

2020-05-25 23:53:40 +02:00

Added subscriber: @MalDuffin

Philipp Oeser commented

2020-05-26 10:35:04 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-05-26 10:35:04 +02:00

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

Philipp Oeser closed this issue

2020-05-26 10:35:04 +02:00

Philipp Oeser self-assigned this 2020-05-26 10:35:04 +02:00

Philipp Oeser commented

2020-05-26 10:35:04 +02:00

Unless I am mistaken, the Grease Pencil object needs to have a material first for this to show?

Just add a material and you should be good to go...

Note: there is still an error when accessing the materials dropdown on such a blank greasepencil object (will tackle this separately though...)

Traceback (most recent call last):
  File "/bin/2.90/scripts/startup/bl_ui/properties_grease_pencil_common.py", line 616, in draw
    ma = ob.material_slots[ob.active_material_index].material
IndexError: bpy_prop_collection[index]: index 0 out of range, size 0

For this report: think we'll have to close this (feel free though to comment again if issues persist...)

Unless I am mistaken, the Grease Pencil object needs to have a material first for this to show? Just add a material and you should be good to go... Note: there is still an error when accessing the materials dropdown on such a blank greasepencil object (will tackle this separately though...) ``` Traceback (most recent call last): File "/bin/2.90/scripts/startup/bl_ui/properties_grease_pencil_common.py", line 616, in draw ma = ob.material_slots[ob.active_material_index].material IndexError: bpy_prop_collection[index]: index 0 out of range, size 0 ``` For this report: think we'll have to close this (feel free though to comment again if issues persist...)

Antonio Vazquez commented

2020-05-26 12:07:02 +02:00

Added subscriber: @antoniov

Antonio Vazquez commented

2020-05-26 12:07:02 +02:00

Changed status from 'Archived' to: 'Confirmed'

Antonio Vazquez reopened this issue

2020-05-26 12:07:02 +02:00

Philipp Oeser was unassigned by Antonio Vazquez

2020-05-26 12:07:02 +02:00

Antonio Vazquez self-assigned this 2020-05-26 12:07:02 +02:00

Antonio Vazquez commented

2020-05-26 12:07:02 +02:00

@lichtwerk There is a problem here, because the vertex color must be usable without materials. I will handle this.

Antonio Vazquez changed title from ~~When adding a blank GreasePencil object, the new Vertex Color option isn't there~~ to GPencil: Object without materials cannot use Vertex Color mode

2020-05-26 12:08:09 +02:00

blender-admin commented

2020-05-26 12:13:25 +02:00

This issue was referenced by 5a1ab3e9ae

This issue was referenced by 5a1ab3e9aeb310af8ce94af2eba0c648d19937cb

Antonio Vazquez commented

2020-05-26 12:13:54 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Antonio Vazquez closed this issue

2020-05-26 12:13:54 +02:00

Antonio Vazquez commented

2020-05-26 12:15:57 +02:00

I have fixed the bug, but to use it, be sure you have these options:

The brush mix factor must be greater than 0.

You are in the right shading mode (Preview or Render) or if you are in Solid mode, you have the Vertex option enabled.

(both parameters are set with the right values in 2D template).

I have fixed the bug, but to use it, be sure you have these options: 1) The brush mix factor must be greater than 0. ![image.png](https://archive.blender.org/developer/F8555370/image.png) 2) You are in the right shading mode (Preview or Render) or if you are in Solid mode, you have the Vertex option enabled. ![image.png](https://archive.blender.org/developer/F8555375/image.png) (both parameters are set with the right values in 2D template).

Philipp Oeser commented

2020-05-26 12:16:14 +02:00

In #77067#938831, @antoniov wrote:
@lichtwerk There is a problem here, because the vertex color must be usable without materials. I will handle this.

Ah, sorry, misunderstanding on my side.

> In #77067#938831, @antoniov wrote: > @lichtwerk There is a problem here, because the vertex color must be usable without materials. I will handle this. Ah, sorry, misunderstanding on my side.

Antonio Vazquez commented

2020-05-26 12:16:28 +02:00

@lichtwerk This fix is not related to the bug you found it when the material list is empty.

Mal Duffin commented

2020-05-27 12:57:34 +02:00

This works great, can confirm it's fixed in 2.83 and 2.90 branches. Cheers!

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GPencil: Object without materials cannot use Vertex Color mode #77067