Incorrect render layer visibility display for animated render layers #39828

New Issue

Willi · 2014-04-21T14:43:16+02:00

Willi commented

2014-04-21 14:43:16 +02:00

System Information
Win7/64, AMD HD 6850

Blender Version
since 2.57b

Short description of error
When navigating forward from a key frame for visibility of render layers to another key frame, the display does not match the actual values:

Actually, only layer 2 is visible.

Exact steps for others to reproduce the error

Open attached file: At frame 0, only render layer 1 is visible. At frame 1, only render layer 2 is visible.
If you navigate from frame 0 to frame 1, the display (as shown in screenshot) incorrectly indicates both render layers are visible, whereas, when navigating from frame 2 to frame 1, display is correct.

RenderLayers.blend

**System Information** Win7/64, AMD HD 6850 **Blender Version** since 2.57b **Short description of error** When navigating forward from a key frame for visibility of render layers to another key frame, the display does not match the actual values: ![Bild_309.JPG](https://archive.blender.org/developer/F85515/Bild_309.JPG) Actually, only layer 2 is visible. **Exact steps for others to reproduce the error** - Open attached file: At frame 0, only render layer 1 is visible. At frame 1, only render layer 2 is visible. - If you navigate from frame 0 to frame 1, the display (as shown in screenshot) incorrectly indicates both render layers are visible, whereas, when navigating from frame 2 to frame 1, display is correct. [RenderLayers.blend](https://archive.blender.org/developer/F85517/RenderLayers.blend)

Willi commented

2014-04-21 14:43:16 +02:00

Changed status to: 'Open'

Willi commented

2014-04-21 14:43:16 +02:00

Added subscriber: @willi-2

Bastien Montagne commented

2014-04-21 20:38:47 +02:00

Added subscribers: @brecht, @ideasman42, @Sergey, @mont29

Bastien Montagne commented

2014-04-21 20:38:47 +02:00

Iirc, this should not be animatable? Brecht, Campbell, Sergey, can you confirm?

Sergey Sharybin commented

2014-04-21 20:43:30 +02:00

From my understanding the things they shouldn't be animatable. But i might be wrong.

Brecht Van Lommel commented

2014-04-22 00:30:27 +02:00

We disabled animation of scene layers because it gave dependency graph issues I think. This render layer value should not suffer from that particular problem.

I think the problem here is the way this RNA property interacts with the animation system. Because it's not allowed to have zero layers enabled, the f-curve that disables the first layer will be ignored when going from frame 0 to 1. That's a tricky issue as well though.

We disabled animation of scene layers because it gave dependency graph issues I think. This render layer value should not suffer from that particular problem. I think the problem here is the way this RNA property interacts with the animation system. Because it's not allowed to have zero layers enabled, the f-curve that disables the first layer will be ignored when going from frame 0 to 1. That's a tricky issue as well though.

Sergey Sharybin commented

2014-04-22 08:04:42 +02:00

@brecht, it doesn't seem render engine supports changes in render layers visibility. Here's a sample file which is free from the mentioned bug in animation but which fails to render animation{F85610}.

AFAIR, this bits are copied into Render and not being updated. We could support this, but isn't it a TODO and meanwhile marking layers as non-animatable is ok-ish thing?

@brecht, it doesn't seem render engine supports changes in render layers visibility. Here's a sample file which is free from the mentioned bug in animation but which fails to render animation{[F85610](https://archive.blender.org/developer/F85610/render-layer-visibility.blend)}. AFAIR, this bits are copied into Render and not being updated. We could support this, but isn't it a TODO and meanwhile marking layers as non-animatable is ok-ish thing?

Willi commented

2014-04-22 11:46:40 +02:00

I see. I'll keep layer 20 visible all the time. Should be a temporary workaround. Not essential for me anyway, so I'll do it differently if you decide to drop animatability of render layers.
Thanks.

I see. I'll keep layer 20 visible all the time. Should be a temporary workaround. Not essential for me anyway, so I'll do it differently if you decide to drop animatability of render layers. Thanks.

Brecht Van Lommel commented

2014-04-22 13:23:45 +02:00

I'm OK with this being marked non-animatable for now.