Drastic performance loss using motion deformation blur with activated explode modifier #41577

New Issue

Thomas Dinges · 2014-08-25T17:42:39+02:00

ag commented

2014-08-25 17:42:39 +02:00

(Migrated from localhost:3001)

System Information
Debian GNU/Linux Jessie (testing)
AMD Phenom II X4 850

Blender Version
Broken: since added motion deformation blur
Worked: before and now with normal motion blur

Short description of error
Once particle system and explode modifier(!) got applied, render performance becomes unusable. See also [1].

Exact steps for others to reproduce the error

enable motion blur with deformation
remesh standard cube
add particle system
add blend texture
and the most important: apply explode modifier (leave only Unborn enabled)

Test file attached:
extremly-slow-at-explode.blend

The frame 1 where the particle system is not yet active is rendered promptly. Go to the frame 2 and the render process becomes extremely slow, though the region being rendered doesn't get changed by the particle system, because of the blend texture: only the almost left side emits particle at start.

Thanks,
Andrey

(1) https://developer.blender.org/T41512

**System Information** Debian GNU/Linux Jessie (testing) AMD Phenom II X4 850 **Blender Version** Broken: since added motion deformation blur Worked: before and now with normal motion blur **Short description of error** Once particle system and explode modifier(!) got applied, render performance becomes unusable. See also [1]. **Exact steps for others to reproduce the error** - enable motion blur with deformation - remesh standard cube - add particle system - add blend texture - and the most important: apply explode modifier (leave only Unborn enabled) Test file attached: [extremly-slow-at-explode.blend](https://archive.blender.org/developer/F106678/extremly-slow-at-explode.blend) The frame 1 where the particle system is not yet active is rendered promptly. Go to the frame 2 and the render process becomes extremely slow, though the region being rendered doesn't get changed by the particle system, because of the blend texture: only the almost left side emits particle at start. Thanks, Andrey (1) https://developer.blender.org/T41512

ag commented

2014-08-25 17:42:39 +02:00

(Migrated from localhost:3001)

Changed status to: 'Open'

ag commented

2014-08-25 17:42:39 +02:00

(Migrated from localhost:3001)

Added subscriber: @ag

Thomas Dinges was assigned by Bastien Montagne

2014-08-25 20:41:34 +02:00

Bastien Montagne commented

2014-08-25 20:41:34 +02:00

Added subscriber: @mont29

Grigore Florin commented

2014-08-26 02:45:46 +02:00

Added subscriber: @numarul7

Grigore Florin commented

2014-08-26 02:45:46 +02:00

Yep confirmed , make you look at the screen and say "hello render!"

GTX 650 4gb driver 340.52 Win 8.1 64 bit

Yep confirmed , make you look at the screen and say "hello render!" GTX 650 4gb driver 340.52 Win 8.1 64 bit

Thomas Dinges commented

2014-08-26 03:40:53 +02:00

I thought you meant the "Freestyle" issue when asking to open a new report, not to report the same motion blur issue a second time. :)

Anyway, Deformation Motion Blur can be disabled, it is optional and also it hasn't been optimized yet at all. I will investigate this more, but setting the priority to Low now, as I think this is rather unoptimized code than a bug.

I thought you meant the "Freestyle" issue when asking to open a new report, not to report the same motion blur issue a second time. :) Anyway, Deformation Motion Blur can be disabled, it is optional and also it hasn't been optimized yet at all. I will investigate this more, but setting the priority to Low now, as I think this is rather unoptimized code than a bug.

Julian Eisel commented

2015-02-23 23:50:38 +01:00

Changed status from 'Open' to: 'Archived'

Julian Eisel closed this issue

2015-02-23 23:50:38 +01:00

Julian Eisel commented

2015-02-23 23:50:38 +01:00

Added subscriber: @JulianEisel