Grease pencil. Stroke color do not match to object`s color #87406

New Issue

Vyacheslav Kobozev · 2021-04-12T00:37:12+02:00

2021-04-12 00:37:12 +02:00

System Information
Operating system: Windows-8.1-6.3.9600-SP0 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40

Blender Version
Broken: since 2.83.9 version: 2.93.0 Alpha, branch: master, commit date: 2021-04-10 16:36, hash: ed5507de8a

Short description of error
When I set full saturation for object color, GP-stroke switches to pale tone.

2021-04-12_01-24-36.mp4

GP object color.blend

**System Information** Operating system: Windows-8.1-6.3.9600-SP0 64 Bits Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40 **Blender Version** Broken: since 2.83.9 version: 2.93.0 Alpha, branch: master, commit date: 2021-04-10 16:36, hash: `ed5507de8a` **Short description of error** When I set full saturation for object color, GP-stroke switches to pale tone. ![12063625.png](https://archive.blender.org/developer/F9929824/12063625.png) [2021-04-12_01-24-36.mp4](https://archive.blender.org/developer/F9929826/2021-04-12_01-24-36.mp4) [GP object color.blend](https://archive.blender.org/developer/F9929828/GP_object_color.blend)

Vyacheslav Kobozev commented

2021-04-12 00:37:12 +02:00

Added subscriber: @Vyach

Falk David commented

2021-04-12 10:17:32 +02:00

Added subscriber: @filedescriptor

Falk David commented

2021-04-12 10:17:32 +02:00

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

Falk David self-assigned this 2021-04-12 10:17:32 +02:00

Falk David commented

2021-04-12 10:17:32 +02:00

I can confirm this in the latest 2.93.0 Alpha, branch: master, commit date: 2021-04-12 07:18, hash: 175c1382da. Will take a look.

I can confirm this in the latest 2.93.0 Alpha, branch: master, commit date: 2021-04-12 07:18, hash: `175c1382da`. Will take a look.

Antonio Vazquez commented

2021-04-12 10:19:34 +02:00

Added subscriber: @antoniov

Antonio Vazquez commented

2021-04-12 10:19:34 +02:00

Yes, confirmed...look if the problem is the Linear->sRGB conversion

Falk David commented

2021-04-12 16:54:08 +02:00

@Vyach The color shift was done intentionally (to make strokes and fills visually differentiable). The fix attached makes it so that if the Lighting in the Viewport Settings is set to "Flat", all the strokes and fills will be set to the same color.

Vyacheslav Kobozev commented

2021-04-12 17:02:31 +02:00

Added subscriber: @1D_Inc

Vyacheslav Kobozev commented

2021-04-12 17:02:31 +02:00

@filedescriptor umm…
I would prefer to select technical color manually to see all better.
Cant agree with such intensions. Similar problem appears with wireframes: I cant make em exact same color, as I set. They always darker or lighter…
It produces many problems with complex scenes. @1D_Inc can explain it better and already did it.

And flat mode wouldn`t help much. I use annotation as BSurfaces guide in work with different colors of surface. And I need to see exact same technical/object color as I choose.
This color shift limits me in color selection.

Please take in account, that ppl can use custom themes, custom viewport backgroungs, and it is important to get what you select, to achieve desirable contrast

@filedescriptor umm… I would prefer to select technical color manually to see all better. Can`t agree with such intensions. Similar problem appears with wireframes: I can`t make em exact same color, as I set. They always darker or lighter… It produces many problems with complex scenes. @1D_Inc can explain it better and already did it. And flat mode wouldn`t help much. I use annotation as BSurfaces guide in work with different colors of surface. And I need to see exact same technical/object color as I choose. This color shift limits me in color selection. Please take in account, that ppl can use custom themes, custom viewport backgroungs, and it is important to get what you select, to achieve desirable contrast

Falk David commented

2021-04-12 17:08:15 +02:00

@Vyach And why is it an issue to use the material color and not the object color? It seems to me like the object color is not really what you are looking for.

Vyacheslav Kobozev commented

2021-04-12 18:21:33 +02:00

In #87406#1145347, @filedescriptor wrote:
@Vyach And why is it an issue to use the material color and not the object color? It seems to me like the object color is not really what you are looking for.

Because for material color you need to set materials for GP and for objects for example.
I do retopo now with GP. So no reason to create empty bunch of meterials just for viewport-colors.

There can be objects with different meterial colors (few per object), they can have same object colors. Material color is more for fast color preview, feling scene in Workbench. More artistical.
Object color is technial. Both gives ability to switch between one and few colors per object.

Also color changes hardly between wireframe and solid mode (relative issue, after «intended change»)
I recorded video with explanation, if it is not so obvious.
https://youtu.be/2nht7BrmScg

> In #87406#1145347, @filedescriptor wrote: > @Vyach And why is it an issue to use the material color and not the object color? It seems to me like the object color is not really what you are looking for. Because for material color you need to set materials for GP and for objects for example. I do retopo now with GP. So no reason to create empty bunch of meterials just for viewport-colors. There can be objects with different meterial colors (few per object), they can have same object colors. Material color is more for fast color preview, feling scene in Workbench. More artistical. Object color is technial. Both gives ability to switch between one and few colors per object. ![изображение.png](https://archive.blender.org/developer/F9930706/изображение.png) Also color changes hardly between wireframe and solid mode (relative issue, after «intended change») I recorded video with explanation, if it is not so obvious. https://youtu.be/2nht7BrmScg

Antonio Vazquez commented

2021-04-12 18:32:38 +02:00

With the change proposed by @filedescriptor you just can set as Flat and you get what you want. Grease Pencil main focus is 2D animation, so get the strokes and fills with a slightly different color is very good. Maybe, for you user case can be annoying, but we cannot set something by default that is against general 2D animation.

Vyacheslav Kobozev commented

2021-04-12 18:45:19 +02:00

@antoniov

Here 2 strokes with very different colors. And they are almost similar in workbench.
GPcolors.blend
Object color is technical stuff. For animation, when you use a lot of colors and layers, you can use material colors.
I cant understand why color should jump to desaturated, esp for Workbench, not for render. Where I can read about usecases? When I want to have pale color, I can set it. When I want to use saturated… Now I cant.
Flat mode in viewport will make objects flat too, so I can`t read surface anymore.

Why do I use GP for retopo? It is cool and easy to edit (sculpt tools), and annotation isn`t.

So I agree it is animators tool first. But cant understand the reason to spoil workbench color.

@antoniov 1. Here 2 strokes with very different colors. And they are almost similar in workbench. [GPcolors.blend](https://archive.blender.org/developer/F9930734/GPcolors.blend) 2. Object color is technical stuff. For animation, when you use a lot of colors and layers, you can use material colors. 3. I can`t understand why color should jump to desaturated, esp for Workbench, not for render. Where I can read about usecases? When I want to have pale color, I can set it. When I want to use saturated… Now I can`t. 4. Flat mode in viewport will make objects flat too, so I can`t read surface anymore. Why do I use GP for retopo? It is cool and easy to edit (sculpt tools), and annotation isn`t. So I agree it is animators` tool first. But can`t understand the reason to spoil workbench color.

Paul Kotelevets commented

2021-04-14 02:04:46 +02:00

It looks like this issue is about general 2d animation vs general consistency.
Technicaly, reasons to provide the difference between stroke and fill are inderstandable, but realization is rough because is illogical and unexpected.
There are a lot of things in Blender that can be technically solved as local overrides, but following this way is not the best way to design software, because harms general consistency.

Maybe adding a preference that controls this effect (for example, its range) can help to solve this issue and also provide GP color shift effect flexibility as well.

It looks like this issue is about general 2d animation vs general consistency. Technicaly, reasons to provide the difference between stroke and fill are inderstandable, but realization is rough because is illogical and unexpected. There are a lot of things in Blender that can be technically solved as local overrides, but following this way is not the best way to design software, because harms general consistency. Maybe adding a preference that controls this effect (for example, its range) can help to solve this issue and also provide GP color shift effect flexibility as well.

blender-admin commented

2021-04-14 18:52:31 +02:00

This issue was referenced by 7c18fb062d

This issue was referenced by 7c18fb062d3656ec76e4e8c1045e7a8c9d44b132

Antonio Vazquez commented

2021-04-14 18:58:05 +02:00

The gpencil team has been discussing about this problem and we have decide to swap the coloring change to fill, so in you case the stroke will have the same color you select. Also, we keep the patch done by @filedescriptor to set flat color.

Antonio Vazquez commented

2021-04-14 19:00:59 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Antonio Vazquez closed this issue

2021-04-14 19:00:59 +02:00

Vyacheslav Kobozev commented

2021-04-15 01:14:58 +02:00

@antoniov Thanks for sharing your time for this :)

Paul Kotelevets commented

2021-04-15 19:22:09 +02:00

In #87406#1146458, @antoniov wrote:
swap the coloring change to fill, so in you case the stroke will have the same color you select.

Well, still pretty far from being clean solution (because is a local override), but with a smaller critical area, because stroke is used more often than fill.

> In #87406#1146458, @antoniov wrote: > swap the coloring change to fill, so in you case the stroke will have the same color you select. Well, still pretty far from being clean solution (because is a local override), but with a smaller critical area, because stroke is used more often than fill.

Antonio Vazquez commented

2021-04-15 19:47:37 +02:00

@1D_Inc We are not closed to add a user prefs setting for this, but we prefer to be very conservative before adding new options to avoid populating too much the user preferences screen. If we see in the future this is requested for more users, we can consider adding it.

Paul Kotelevets commented

2021-04-16 10:13:30 +02:00

Nice strategy, pretty safe.
Wise solution, because adding preferences increase software fragmentation.
Thank you.

Nice strategy, pretty safe. Wise solution, because adding preferences increase software fragmentation. Thank you.

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Grease pencil. Stroke color do not match to object`s color #87406