Freeze while rendering animation in Cycles with layers and motion blur #40149

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opened 2014-05-12 03:30:59 +02:00 by Konstantins Visnevskis · 7 comments

Konstantins Visnevskis commented

2014-05-12 03:30:59 +02:00

Win 8.1 x64, 3x gtx580, 2.70a

When rendering multiple layers in a batch animation with motion blur, some layers get extremely slow (compared to rendering one by one) and freeze Blender or whole system.

Open attached file, press render animation.
First (Mesh) layer renders fine, the second (floor/shadow) behaves like:

On CPU - extremely slow (compared to rendering only this render layer. not to confuse with scene layer), cancellation takes couple of minutes.
On all GPUs - system freeze (presumably it stays alive, but display gets no updates anymore).
On single non-primary GPU - extremely slow, blocks don't get updated until complete. Render cancellation takes a minute or two.

This behavior is not observed if motion blur is turned off.
This behavior is not observed if render layers are rendered one by one, manually un-chec the others, even with motion blur on.

{F88555}king

Win 8.1 x64, 3x gtx580, 2.70a When rendering multiple layers in a batch animation with motion blur, some layers get extremely slow (compared to rendering one by one) and freeze Blender or whole system. Open attached file, press render animation. First (Mesh) layer renders fine, the second (floor/shadow) behaves like: - On CPU - extremely slow (compared to rendering only this render layer. not to confuse with scene layer), cancellation takes couple of minutes. - On all GPUs - system freeze (presumably it stays alive, but display gets no updates anymore). - On single non-primary GPU - extremely slow, blocks don't get updated until complete. Render cancellation takes a minute or two. This behavior is not observed if motion blur is turned off. This behavior is not observed if render layers are rendered one by one, manually un-chec the others, even with motion blur on. {[F88555](https://archive.blender.org/developer/F88555/err2.blend)}king

Konstantins Visnevskis commented

2014-05-12 03:30:59 +02:00

Author

Changed status to: 'Open'

Changed status to: 'Open'

Konstantins Visnevskis commented

2014-05-12 03:30:59 +02:00

Author

Added subscriber: @KonstantinsVisnevskis

Added subscriber: @KonstantinsVisnevskis

Brecht Van Lommel commented

2014-05-12 14:16:28 +02:00

Owner

Added subscriber: @brecht

Added subscriber: @brecht

Brecht Van Lommel commented

2014-05-12 14:16:28 +02:00

Owner

Looks like some sort of bug updating the motion blur BVH when another object is added to it.

Looks like some sort of bug updating the motion blur BVH when another object is added to it.

blender-admin commented

2014-05-12 18:37:49 +02:00

This issue was referenced by 1b1b71f697

This issue was referenced by 1b1b71f6970b54d70c99e9f616f93096df261e29

Brecht Van Lommel commented

2014-05-12 19:00:19 +02:00

Owner

Fixed in 1b1b71f697, thanks for the report.

Fixed in 1b1b71f697, thanks for the report.

Brecht Van Lommel commented

2014-05-12 19:00:32 +02:00

Owner

Changed status from 'Open' to: 'Resolved'

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2014-05-12 19:00:32 +02:00

Brecht Van Lommel self-assigned this 2014-05-12 19:00:32 +02:00

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Reference: blender/blender#40149

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