Difference of position of cloth animated mesh between viewport and render result #39195

New Issue

Willi · 2014-03-15T04:51:17+01:00

Willi commented

2014-03-15 04:51:17 +01:00

System Information
Win 7/64, AMD HD 6850

Blender Version
2.70 (Can't remember it ever worked.)

Short description of error
A cloth animated mesh that is part of a group instance is not rendered at the correct location as in the viewport.

Exact steps for others to reproduce the error
Open the attached file and render. Problem: The cloth is rendered at a position different to the viewport.

Test_116.zip

Note that layer 1 contains only a group instance. Switch to layer 2 to see the group definition: The cloth has been animated by a cloth animation, and the cache has been baken. However, as the viewport can display the cloth within the group instance in layer 1 at the expected location, the renderer should be able to do so, too.

**System Information** Win 7/64, AMD HD 6850 **Blender Version** 2.70 (Can't remember it ever worked.) **Short description of error** A cloth animated mesh that is part of a group instance is not rendered at the correct location as in the viewport. **Exact steps for others to reproduce the error** Open the attached file and render. Problem: The cloth is rendered at a position different to the viewport. [Test_116.zip](https://archive.blender.org/developer/F81220/Test_116.zip) Note that layer 1 contains only a group instance. Switch to layer 2 to see the group definition: The cloth has been animated by a cloth animation, and the cache has been baken. However, as the viewport can display the cloth within the group instance in layer 1 at the expected location, the renderer should be able to do so, too.

Willi commented

2014-03-15 04:51:17 +01:00

Changed status to: 'Open'

Willi commented

2014-03-15 04:51:17 +01:00

Added subscriber: @willi-2

Sergey Sharybin commented

2014-03-21 10:37:19 +01:00

Added subscriber: @Sergey

Sergey Sharybin commented

2014-03-21 10:37:19 +01:00

First guess is that it happens because of order in which object position and cache load happens in case of dupli-stuff physics. Will check whether it's solvable with the current design.

Sergey Sharybin self-assigned this 2014-03-21 10:37:23 +01:00

Sergey Sharybin commented

2014-03-25 10:22:12 +01:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2014-03-25 10:22:12 +01:00

Sergey Sharybin commented

2014-03-25 10:22:12 +01:00

Spend quite a while trying to solve the issue. It is actually a limitation of the render database creation in Blender Internal. Technically it's caused by the render pipeline changing object's matrix before evaluating modifier stack. It's possible to support point caches working here, but then file from #38801 wouldn't work.

Some bigger render database refactor is needed. We'll need to do it for granular depgraph and copy-on-write projects anyway, so better solve all the issues all at once.

Added the note in our TODO list: http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Render#Render_Engine

Thanks for the report, but for now will consider this is a TODO.

Spend quite a while trying to solve the issue. It is actually a limitation of the render database creation in Blender Internal. Technically it's caused by the render pipeline changing object's matrix before evaluating modifier stack. It's possible to support point caches working here, but then file from #38801 wouldn't work. Some bigger render database refactor is needed. We'll need to do it for granular depgraph and copy-on-write projects anyway, so better solve all the issues all at once. Added the note in our TODO list: http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Render#Render_Engine Thanks for the report, but for now will consider this is a TODO.

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Difference of position of cloth animated mesh between viewport and render result #39195