Box selection, tool or B key, doesn't select more than 5K objects #102485

New Issue

Sidney Moraes Jr · 2022-11-13T23:42:09+01:00

Sidney Moraes Jr commented

2022-11-13 23:42:09 +01:00

System Information
Operating system: Windows 10
Graphics card: GTX 970

Blender Version
Broken: 3.3.1

Short description of error
Hello. The box selection tool (W key) and the B key tool don't select more than 5k objects. If one of them is already a deselected active object, it will work for only 4999.
Some tests I did here:

I've got the same behavior for orthographic and perspective; I've tried to change the clip Start and End, and focal length and I still got the same results;
Doesn't matter the area, it is always the object number;

It is probably related to https://developer.blender.org/T102487

Exact steps for others to reproduce the error
Selection_+5K_objects_doesn't work.blend
With Object A active:

Selecting the 4999 objects + B giving a total of 5k objects will work;
Selecting the 4999 objects + B + C won't select;

With Object B Active:

Selecting the 4999 objects works;
Selecting the 4999 objects + B won't select;

Selection_5k_objects.webm

**System Information** Operating system: Windows 10 Graphics card: GTX 970 **Blender Version** Broken: 3.3.1 **Short description of error** Hello. The box selection tool (W key) and the B key tool don't select more than 5k objects. If one of them is already a deselected active object, it will work for only 4999. Some tests I did here: - I've got the same behavior for orthographic and perspective; I've tried to change the clip Start and End, and focal length and I still got the same results; - Doesn't matter the area, it is always the object number; It is probably related to https://developer.blender.org/T102487 **Exact steps for others to reproduce the error** [Selection_+5K_objects_doesn't work.blend](https://archive.blender.org/developer/F13905363/Selection__5K_objects_doesn_t_work.blend) With Object A active: - Selecting the 4999 objects + B giving a total of 5k objects will work; - Selecting the 4999 objects + B + C won't select; With Object B Active: - Selecting the 4999 objects works; - Selecting the 4999 objects + B won't select; [Selection_5k_objects.webm](https://archive.blender.org/developer/F13905422/Selection_5k_objects.webm)

Sidney Moraes Jr commented

2022-11-13 23:42:09 +01:00

Added subscriber: @SidneyMoraesJr

blender-admin commented

2022-11-13 23:42:09 +01:00

#103309 was marked as duplicate of this issue

blender-admin commented

2022-11-13 23:42:09 +01:00

blender/blender#102487 was marked as duplicate of this issue

Iliya Katushenock commented

2022-11-13 23:46:42 +01:00

Added subscriber: @mod_moder

Iliya Katushenock commented

2022-11-13 23:46:42 +01:00

I can confirm that selecting does indeed start to work in a very strange and unreliable way.

Jesse Yurkovich commented

2022-11-14 00:54:36 +01:00

Added subscriber: @deadpin

Jesse Yurkovich commented

2022-11-14 00:54:36 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Jesse Yurkovich commented

2022-11-14 00:54:36 +01:00

The 2500 limit was introduced many years ago as part of blender/blender@50e9868abe

It's hardcoded right now. The particular usage of this value during selection is roughly 2 * MAXPICKELEMS as seen in:
https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/space_view3d/view3d_select.cc$3740

/**
 * The default value for the maximum number of elements that can be selected at once
 * using view-port selection.
 *
 * \note in many cases this defines the size of fixed-size stack buffers,
 * so take care increasing this value.
 */
#define MAXPICKELEMS 2500

The 2500 limit was introduced many years ago as part of blender/blender@50e9868abe It's hardcoded right now. The particular usage of this value during selection is roughly 2 * MAXPICKELEMS as seen in: https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/space_view3d/view3d_select.cc$3740 ``` /** * The default value for the maximum number of elements that can be selected at once * using view-port selection. * * \note in many cases this defines the size of fixed-size stack buffers, * so take care increasing this value. */ #define MAXPICKELEMS 2500 ```

Jesse Yurkovich commented

2022-12-18 10:17:16 +01:00

Added subscriber: @TestPilot02

Jeroen Bakker commented

2022-12-19 08:34:04 +01:00

Added subscriber: @Jeroen-Bakker

Jeroen Bakker commented

2022-12-19 08:34:04 +01:00

This is a limitation of GL depth picking. If you want to be able to select, select a different method in your user preferences.

I expected a better description of this limitation as this case isn't described well.

https://docs.blender.org/manual/en/latest/troubleshooting/3d_view.html?highlight=gpu+depth+picking#slow-selection
https://docs.blender.org/manual/en/latest/editors/preferences/viewport.html#selection

This is a limitation of GL depth picking. If you want to be able to select, select a different method in your user preferences. ![image.png](https://archive.blender.org/developer/F14068862/image.png) I expected a better description of this limitation as this case isn't described well. https://docs.blender.org/manual/en/latest/troubleshooting/3d_view.html?highlight=gpu+depth+picking#slow-selection https://docs.blender.org/manual/en/latest/editors/preferences/viewport.html#selection

Jeroen Bakker commented

2022-12-19 08:39:59 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Jeroen Bakker commented

2022-12-19 08:39:59 +01:00

Solution is changing the manual to update the limitations and possible work-arounds to the manual. Perhaps the text in the error message could be adjusted afterwards to be more user-oriented.

Aaron Carlisle commented

2023-01-09 06:13:23 +01:00

Added subscriber: @Blendify

Aaron Carlisle commented

2023-01-09 06:13:23 +01:00

The issue does not go away when disabling "GPU Depth Selection" and by the commit @deadpin posted also shows that it is unrelated. AFAIK there are no limitations in this case. Perhaps the limitation can be fixed, or at least increased from the prior limit? I have not looked at the code deeply but why is this only a limitation for object selection? edit mode selection works fine.

Michael Klein commented

2023-01-19 22:00:37 +01:00

Added subscriber: @Renderbicks

Michael Klein commented

2023-01-19 22:00:37 +01:00

Lasso Select works as intended with an unlimited number.

Michael Klein commented

2023-01-19 22:03:22 +01:00

In #102485#1462889, @Jeroen-Bakker wrote:
This is a limitation of GL depth picking. If you want to be able to select, select a different method in your user preferences.

I expected a better description of this limitation as this case isn't described well.

https://docs.blender.org/manual/en/latest/troubleshooting/3d_view.html?highlight=gpu+depth+picking#slow-selection
https://docs.blender.org/manual/en/latest/editors/preferences/viewport.html#selection

What is the technical difference between Lasso and Box select? Lasso Select seems to work with an unlimited number of models.

> In #102485#1462889, @Jeroen-Bakker wrote: > This is a limitation of GL depth picking. If you want to be able to select, select a different method in your user preferences. > > ![image.png](https://archive.blender.org/developer/F14068862/image.png) > > I expected a better description of this limitation as this case isn't described well. > > https://docs.blender.org/manual/en/latest/troubleshooting/3d_view.html?highlight=gpu+depth+picking#slow-selection > https://docs.blender.org/manual/en/latest/editors/preferences/viewport.html#selection What is the technical difference between Lasso and Box select? Lasso Select seems to work with an unlimited number of models.

Steffen Dünner commented

2023-01-20 10:05:48 +01:00

Added subscriber: @SteffenD

Philipp Oeser commented

2023-01-20 10:28:34 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2023-01-20 10:28:34 +01:00

@Jeroen-Bakker : can you comment on the MAXPICKELEMS thingie?

@Jeroen-Bakker : can you comment on the `MAXPICKELEMS` thingie?

Filippo Fracascia commented

2023-01-28 14:41:04 +01:00

Added subscriber: @filippo_f

Filippo Fracascia commented

2023-01-28 14:41:04 +01:00

I've been testing different values for MAXPICKELEMS and it does work fine for the range I've tried (2500-50000, my hardware won't handle more objects at once).

I can't find any documentation about OpenGL depth picking limitations.

Looking at blender/blender#43785 diff buffer size has been changed from 40000 to 10000.

By providing max 50000 MAXPICKELEMS I get a buffer size of 200000 and it's still working.

At this point might this problem be related to a specific os? I see that the author of the issue was using Ubuntu.

I've been testing different values for MAXPICKELEMS and it does work fine for the range I've tried (2500-50000, my hardware won't handle more objects at once). ![50000.PNG](https://archive.blender.org/developer/F14206259/50000.PNG) I can't find any documentation about OpenGL depth picking limitations. Looking at [blender/blender#43785 diff ](https://developer.blender.org/rB50e9868abe11bd2ed0173b7a51cf129d77e4389e) buffer size has been changed from 40000 to 10000. By providing max 50000 MAXPICKELEMS I get a buffer size of 200000 and it's still working. At this point might this problem be related to a specific os? I see that the author of the issue was using Ubuntu.

Michael Klein commented

2023-01-28 15:03:41 +01:00

In #102485#1480793, @filippo_f wrote:
I've been testing different values for MAXPICKELEMS and it does work fine for the range I've tried (2500-50000, my hardware won't handle more objects at once).

I can't find any documentation about OpenGL depth picking limitations.

Looking at blender/blender#43785 diff buffer size has been changed from 40000 to 10000.

By providing max 50000 MAXPICKELEMS I get a buffer size of 200000 and it's still working.

At this point might this problem be related to a specific os? I see that the author of the issue was using Ubuntu.

I am using right now an addon by Yain Rodrigo Vieyra from Argentina. This saves actually my project but doesn't solve the corrupted data management when exceeding 65K objects in a Blender file.

I asked him to sign up and join the conversation.

> In #102485#1480793, @filippo_f wrote: > I've been testing different values for MAXPICKELEMS and it does work fine for the range I've tried (2500-50000, my hardware won't handle more objects at once). > > ![50000.PNG](https://archive.blender.org/developer/F14206259/50000.PNG) > > I can't find any documentation about OpenGL depth picking limitations. > > Looking at [blender/blender#43785 diff ](https://developer.blender.org/rB50e9868abe11bd2ed0173b7a51cf129d77e4389e) buffer size has been changed from 40000 to 10000. > > By providing max 50000 MAXPICKELEMS I get a buffer size of 200000 and it's still working. > > At this point might this problem be related to a specific os? I see that the author of the issue was using Ubuntu. I am using right now an addon by Yain Rodrigo Vieyra from Argentina. This saves actually my project but doesn't solve the corrupted data management when exceeding 65K objects in a Blender file. I asked him to sign up and join the conversation.

Aaron Carlisle removed the

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Box selection, tool or B key, doesn't select more than 5K objects #102485