Blender opens a new render window even when one is open already. #88755

New Issue

JL Garcia · 2021-06-02T21:22:36+02:00

JL Garcia commented

2021-06-02 21:22:36 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: Intel(R) HD Graphics 530 Intel 4.5.0 - Build 27.20.100.9466

Blender Version
Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: 84da05a8b8
Worked: (newest version of Blender that worked as expected)

Short description of error
New render window opens while another is open already.

Exact steps for others to reproduce the error

Open Blender
Create an object or use the default cube

Render (F12)

      (I usually render using the render window that appears floating, not a window inside the UI)

Save the file with the floating window open. (test_object_01.blend)
Close the file completely or open a new blank file (File > New > General
Open the test_object_01.blend
It should open with the render window open in the same place it was before.
Hit render (F12) and another render window opens.
Close the new render window

Render and it opens again

    [Hope this is clear]

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: Intel(R) HD Graphics 530 Intel 4.5.0 - Build 27.20.100.9466 **Blender Version** Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: `84da05a8b8` Worked: (newest version of Blender that worked as expected) **Short description of error** New render window opens while another is open already. **Exact steps for others to reproduce the error** - Open Blender - Create an object or use the default cube # Render (F12) ``` (I usually render using the render window that appears floating, not a window inside the UI) ``` - Save the file with the floating window open. (test_object_01.blend) - Close the file completely or open a new blank file (File > New > General - Open the test_object_01.blend - It should open with the render window open in the same place it was before. - Hit render (F12) and another render window opens. - Close the new render window # Render and it opens again ``` [Hope this is clear] ```

JL Garcia commented

2021-06-02 21:22:36 +02:00

Added subscriber: @jlgarcia

Pratik Borhade commented

2021-06-03 06:09:35 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-06-03 06:09:35 +02:00

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

Pratik Borhade commented

2021-06-03 06:09:35 +02:00

I can reproduce this for 2.93.0 (Hash: de06cb8559, commit date : 2021-03-17) and 3.0.0 (Hash: 711ddea60e) but can not reproduce for 2.92.0

Confirming the bug but don't have to bisect this right now :(

I can reproduce this for 2.93.0 (Hash: `de06cb8559`, commit date : `2021-03-17`) and 3.0.0 (Hash: `711ddea60e`) but can not reproduce for 2.92.0 Confirming the bug but don't have to bisect this right now :(

Pratik Borhade commented

2021-06-03 12:15:24 +02:00

This comment was removed by @PratikPB2123

*This comment was removed by @PratikPB2123*

Harley Acheson commented

2021-08-26 19:49:41 +02:00

Added subscriber: @Harley

Harley Acheson commented

2021-08-26 19:49:41 +02:00

Interesting.

I can see why it happens, but not sure exactly how to approach fixing it.

There used to be just a single "temporary" window that was always reused. So rendering a second time would use the same window, but it could also take the place of an open "Preferences" window too.

With 2.93 we are no longer reusing a single temp window like that. But to keep from always getting new windows, we reuse them if the window title matches. So you render, it creates a window called "Blender Render". If a window of that name is already existing when you render again it will use that one.

However, when the blend file is reloaded and the windows recreated that one gets a title of "Blender", not "Blender Render", which is why you get a new one.

Will take a look in a bit.

Interesting. I can see why it happens, but not sure exactly how to approach fixing it. There used to be just a single "temporary" window that was always reused. So rendering a second time would use the same window, but it could also take the place of an open "Preferences" window too. With 2.93 we are no longer reusing a single temp window like that. But to keep from always getting new windows, we reuse them if the window *title matches*. So you render, it creates a window called "Blender Render". If a window of that name is already existing when you render again it will use that one. However, when the blend file is reloaded and the windows recreated that one gets a title of "Blender", not "Blender Render", which is why you get a new one. Will take a look in a bit.

JL Garcia commented

2021-08-26 21:52:53 +02:00

So, the name of the window changed with the version? What about checking if there is any window open before opening another? or checking for the legacy name and see if is open too? or assigning the "Blender Render" to the open window at opening file time? Just throwing ideas if that helps you.

Harley Acheson commented

2021-08-26 21:58:51 +02:00

@jlgarcia - So, the name of the window changed with the version?

Nope. Checking for the name of the window at all is new. It used to blindly take over an existing window, even if it wasn't a render window.

What about checking if there is any window open before opening another?

Many users, who have multiple monitors, will quite often save with many many windows open.

or checking for the legacy name and see if is open too?

As mentioned, that window opens up with a title of just "Blender".

Just throwing ideas if that helps you.

No worries, will look at it soon, as mentioned.

> @jlgarcia - So, the name of the window changed with the version? Nope. Checking for the name of the window at all is new. It used to blindly take over an existing window, even if it wasn't a render window. > What about checking if there is any window open before opening another? Many users, who have multiple monitors, will quite often save with many many windows open. > or checking for the legacy name and see if is open too? As mentioned, that window opens up with a title of just "Blender". > Just throwing ideas if that helps you. No worries, will look at it soon, as mentioned.

JL Garcia commented

2021-08-27 00:45:25 +02:00

Many users, who have multiple monitors, will quite often save with many many windows open.

Yes, that's my case, sometimes I save with the render window open in another screen, don't know if this bug happens with another windows.

> > Many users, who have multiple monitors, will quite often save with many many windows open. > Yes, that's my case, sometimes I save with the render window open in another screen, don't know if this bug happens with another windows.

blender-admin commented

2021-09-09 18:26:44 +02:00

This issue was referenced by 84d03a1298

This issue was referenced by 84d03a1298c170a3cd61c8c7f9a0177da8fcfc35

Harley Acheson commented

2021-09-09 18:28:14 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Harley Acheson closed this issue

2021-09-09 18:28:14 +02:00

Harley Acheson self-assigned this 2021-09-09 18:28:14 +02:00

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Blender opens a new render window even when one is open already. #88755

Render (F12)

Render and it opens again