Autosmooth + Custom Normals is slow #88710

New Issue

Joseph Eagar · 2021-05-31T19:18:31+02:00

Joseph Eagar commented

2021-05-31 19:18:31 +02:00

System Information
Operating system: Windows 10
Graphics card: Nvidia mx230

Blender Version
Broken:
master

Short description of error

Using autosmooth and custom normals at the same time is slow, even in situations where you wouldn't
expect normal calculation to happen (like moving an object in object mode).

Exact steps for others to reproduce the error

normal_autosmooth_slow.blend

Load the .blend file. Move the object around, it should be slow.
Either disable autosmooth, or clear custom split normals.

Moving the object should now be a lot faster

**System Information** Operating system: Windows 10 Graphics card: Nvidia mx230 **Blender Version** Broken: master **Short description of error** Using autosmooth and custom normals at the same time is slow, even in situations where you wouldn't expect normal calculation to happen (like moving an object in object mode). **Exact steps for others to reproduce the error** [normal_autosmooth_slow.blend](https://archive.blender.org/developer/F10151110/normal_autosmooth_slow.blend) - Load the .blend file. Move the object around, it should be slow. - Either disable autosmooth, or clear custom split normals. # Moving the object should now be a lot faster

Joseph Eagar commented

2021-05-31 19:18:31 +02:00

Added subscriber: @JosephEagar

Pratik Borhade commented

2021-06-01 06:20:42 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-06-01 06:20:42 +02:00

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

Pratik Borhade commented

2021-06-01 06:20:42 +02:00

Hi @JosephEagar , I can confirm the report. It is reproducible since 2.92.0 (Hash: 02948a2cab, commit date: 2021-02-24). Not tested for other versions (< 2.92.0)

I assume tag would be modelling here? Correct me If I am wrong :)

Hi @JosephEagar , I can confirm the report. It is reproducible since 2.92.0 (Hash: `02948a2cab`, commit date: `2021-02-24`). Not tested for other versions (< 2.92.0) I assume tag would be modelling here? Correct me If I am wrong :)

Campbell Barton commented

2021-08-03 06:59:51 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2021-08-03 06:59:51 +02:00

Re:

Using autosmooth and custom normals at the same time is slow, even in situations where you wouldn't expect normal calculation to happen (like moving an object in object mode).

Marking this as "Geometry Nodes", since normals are only recalculating with geometry nodes (even when they're disabled).

Re: > Using autosmooth and custom normals at the same time is slow, even in situations where you wouldn't expect normal calculation to happen (like moving an object in object mode). Marking this as "Geometry Nodes", since normals are only recalculating with geometry nodes (even when they're disabled).

Hans Goudey commented

2021-11-09 21:53:33 +01:00

Added subscriber: @HooglyBoogly

Hans Goudey commented

2021-11-09 21:53:33 +01:00

Testing this (starting animation playback and looking at the FPS, I get the same results with and without the geometry nodes modifier. Moving the character around is slow until I remove the mirror modifier.

Philipp Oeser commented

2022-03-29 13:16:43 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-03-29 13:16:43 +02:00

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

Philipp Oeser commented

2022-03-29 13:16:43 +02:00

I think the Shrinkwrap also has its role here (just removing that one -- even if disabled -- make the whole thing snappy again on my side).
Can you confirm?

I think the Shrinkwrap also has its role here (just removing that one -- even if disabled -- make the whole thing snappy again on my side). Can you confirm?

Philipp Oeser removed the

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Autosmooth + Custom Normals is slow #88710

Moving the object should now be a lot faster