UI: OCIO Display/View controls per window #112567

New Issue

Mark-Boorer · 2023-09-19T12:13:36+02:00

Mark-Boorer commented

2023-09-19 12:13:36 +02:00

I am seeking feedback on a UI addition / feature proposal before I start implementing it. I have a rough, non-functional mockup done so far, but wanted to make sure I was putting effort into the right place.

Problem

The Color Management UI is under the “Render Properties” panel. This panel allows users to choose from the available Display/Views provided by OCIO. The choices made in this panel are applied globally - to all image editors and 3D viewports. If the user has parts of their Blender UI on different monitors, or wants to see their work under multiple views simultaneously, this is currently not possible.

Proposed Solution

In addition to the existing global/scene level controls, we also add window specific Color Management controls. These window specific controls would initially share the scene level “default” settings, but would retain their independence if changed.

A possible implementation of this would place a Color Management entry under the View section of the Sidebar:

Any feedback would be greatly appreciated.

I am seeking feedback on a UI addition / feature proposal before I start implementing it. I have a rough, non-functional mockup done so far, but wanted to make sure I was putting effort into the right place. Problem ======= The Color Management UI is under the “Render Properties” panel. This panel allows users to choose from the available Display/Views provided by OCIO. The choices made in this panel are applied globally - to all image editors and 3D viewports. If the user has parts of their Blender UI on different monitors, or wants to see their work under multiple views simultaneously, this is currently not possible. Proposed Solution =============== In addition to the existing global/scene level controls, we also add window specific Color Management controls. These window specific controls would initially share the scene level “default” settings, but would retain their independence if changed. A possible implementation of this would place a Color Management entry under the View section of the Sidebar: ![blender_per_window_ocio_controls.png](/attachments/17f641d5-a48b-4118-9244-03879e4eeb2f) Any feedback would be greatly appreciated.

blender_per_window_ocio_controls.png

102 KiB

Mark-Boorer added the

Type

Design

label 2023-09-19 12:13:36 +02:00

Nika Kutsniashvili commented

2023-09-19 12:26:25 +02:00

You can use existing UI that is in Output panel in render properties. Makes it very clear that you have the choice and where your colors are controlled from

![image](/attachments/69ec80b8-c41c-476a-a227-899c27dd1229) You can use existing UI that is in Output panel in render properties. Makes it very clear that you have the choice and where your colors are controlled from

image.png

12 KiB

Mark-Boorer commented

2023-09-19 12:48:31 +02:00

Hi Nika, I mentioned that panel in the Problem section. Those settings are global to Blender. I would like to have two windows to the same scene with independent Color Management controls.

Nika Kutsniashvili commented

2023-09-19 13:22:43 +02:00

That is not the panel in the screenshot. One you're referring to is Color Management tab in Render properties. This one is in Output properties, under Output panel. Confusing, I know.

Purpose of this panel is that you can choose before final render if you want to use global color management settings, or override them for this particular render. So you have two panels - one for global management, and one for specific renders. Since you want similar thing but for windows instead of renders, I thought you could use the "Follow Scene / Override' buttons that already exist.

That is not the panel in the screenshot. One you're referring to is Color Management tab in Render properties. This one is in Output properties, under Output panel. Confusing, I know. Purpose of this panel is that you can choose before final render if you want to use global color management settings, or override them for this particular render. So you have two panels - one for global management, and one for specific renders. Since you want similar thing but for windows instead of renders, I thought you could use the "Follow Scene / Override' buttons that already exist.

Mark-Boorer commented

2023-09-19 17:17:26 +02:00

Ah I see now. Yes, that UI element does look appropriate!

Brecht Van Lommel commented

2023-09-20 20:55:56 +02:00

An issue that display transforms in Blender aren't really working well at all. Some more background on this is here:
#105714 (comment)

Blender creates a window with a buffer without tagging it as having any particular color space, which means the operating will generally assume it to be just sRGB. And then if you use a monitor with a different color space, the operating system will convert from sRGB to that color space.

It seems like at least on Windows and macOS the latest operating systems APIs prefer you to output to some fixed, linear, wide gamut color space and let the operating system do appropriate display transform for every monitor. And so in that kind of system, a display color space choice per window doesn't really make any sense, but a view transform and exposure might still.

So I guess the first thing I'm wondering is, does changing the display in the scene color management settings actually work for you now? I can imagine that it works with some combination of operating system and settings, but still the UI colors would be off then.

An issue that display transforms in Blender aren't really working well at all. Some more background on this is here: https://projects.blender.org/blender/blender/issues/105714#issuecomment-987867 Blender creates a window with a buffer without tagging it as having any particular color space, which means the operating will generally assume it to be just sRGB. And then if you use a monitor with a different color space, the operating system will convert from sRGB to that color space. It seems like at least on Windows and macOS the latest operating systems APIs prefer you to output to some fixed, linear, wide gamut color space and let the operating system do appropriate display transform for every monitor. And so in that kind of system, a display color space choice per window doesn't really make any sense, but a view transform and exposure might still. So I guess the first thing I'm wondering is, does changing the display in the scene color management settings actually work for you now? I can imagine that it works with some combination of operating system and settings, but still the UI colors would be off then.

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UI: OCIO Display/View controls per window #112567

Problem

Proposed Solution