Auto Render doesnt work with scene animations #77349

New Issue

Keen Foong · 2020-06-04T09:01:42+02:00

Keen Foong commented

2020-06-04 09:01:42 +02:00

{F8575831}System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.92

Blender Version
Broken: version: 2.83.0 Beta, branch: master, commit date: 2020-05-30 15:33, hash: ec26260132

Short description of error
It should render when the scene animation updates. In general auto render also seems a bit unreliable. eg. Sometimes I turn it off and it keeps rendering, and it doesn't render even if some changes are made to the scene. Anyway in this case it doesn't update when there're scene animations.

Exact steps for others to reproduce the error
From startup:

Set "Use nodes" in compositor
Turn on "Auto render"
Animate default cube (I used rotate here)
Scrub timeline
It doesn't auto render with new changes.

With attached blend:

Scrub timeline

autorender_animation.blend

{[F8575831](https://archive.blender.org/developer/F8575831/autorender.gif)}**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.92 **Blender Version** Broken: version: 2.83.0 Beta, branch: master, commit date: 2020-05-30 15:33, hash: `ec26260132` **Short description of error** It should render when the scene animation updates. In general auto render also seems a bit unreliable. eg. Sometimes I turn it off and it keeps rendering, and it doesn't render even if some changes are made to the scene. Anyway in this case it doesn't update when there're scene animations. **Exact steps for others to reproduce the error** From startup: 1. Set "Use nodes" in compositor 2. Turn on "Auto render" 3. Animate default cube (I used rotate here) 4. Scrub timeline It doesn't auto render with new changes. With attached blend: - Scrub timeline [autorender_animation.blend](https://archive.blender.org/developer/F8575878/autorender_animation.blend)

Keen Foong commented

2020-06-04 09:01:42 +02:00

Added subscriber: @kfoong

blender-admin commented

2020-06-04 09:01:42 +02:00

#90886 was marked as duplicate of this issue

Alaska commented

2020-06-04 09:17:32 +02:00

Added subscriber: @Alaska

Alaska commented

2020-06-04 09:17:32 +02:00

It should render when the scene animation updates.

I'm able to reproduce the issue you're describing in both Blender 2.83 and 2.82a. However, I don't believe this is a issue. From my understanding auto render doesn't work when you scrub the time line as it's a means of keeping the scrubbing process or animation playback smooth for the end user.

In general auto render also seems a bit unreliable

I'm personally unable to reproduce this on my system, however, I've only been playing around with it in Blender 2.83 for about 5 minutes.

Note (not that important to triaging the bug): Blender 2.83.0 is official released. Make sure you download it from here https://www.blender.org/download/

> It should render when the scene animation updates. I'm able to reproduce the issue you're describing in both Blender 2.83 and 2.82a. However, I don't believe this is a issue. From my understanding auto render doesn't work when you scrub the time line as it's a means of keeping the scrubbing process or animation playback smooth for the end user. > In general auto render also seems a bit unreliable I'm personally unable to reproduce this on my system, however, I've only been playing around with it in Blender 2.83 for about 5 minutes. Note (not that important to triaging the bug): Blender 2.83.0 is official released. Make sure you download it from here https://www.blender.org/download/

Keen Foong commented

2020-06-04 10:11:07 +02:00

From my understanding auto render doesn't work when you scrub the time line as it's a means of keeping the scrubbing process or animation playback smooth for the end user.

However it does do an auto render every time it scrubs currently. It only updates if there's animation in the compositor. Having the scene animation render would be incredible for motion graphics, as text objects are animated quickly in Eevee. So you would be able to tweak the composition on the fly, like after effects. Would be great for title screen animations and the such.

In general auto render also seems a bit unreliable

I think I managed to break this one down a little further. Not sure whether to put this in a new bug report or not, let me know if I do. I'll put it here as well.

Pressing Render stops auto render from working with scene edits

Set "Use nodes" in compositor
Turn on "Auto render"
Move cube (You'll see that auto render works here)
Press "Render"
Move the cube again. You'll see the cube doesn't update any more.

> From my understanding auto render doesn't work when you scrub the time line as it's a means of keeping the scrubbing process or animation playback smooth for the end user. However it does do an auto render every time it scrubs currently. It only updates if there's animation in the compositor. Having the scene animation render would be incredible for motion graphics, as text objects are animated quickly in Eevee. So you would be able to tweak the composition on the fly, like after effects. Would be great for title screen animations and the such. ![autorender_compositor.gif](https://archive.blender.org/developer/F8575975/autorender_compositor.gif) > In general auto render also seems a bit unreliable I think I managed to break this one down a little further. Not sure whether to put this in a new bug report or not, let me know if I do. I'll put it here as well. **Pressing Render stops auto render from working with scene edits** ![renderbreaks_autorender.gif](https://archive.blender.org/developer/F8575990/renderbreaks_autorender.gif) 1. Set "Use nodes" in compositor 2. Turn on "Auto render" 3. Move cube (You'll see that auto render works here) 4. Press "Render" 4. Move the cube again. You'll see the cube doesn't update any more.

Germano Cavalcante commented

2020-06-05 20:12:15 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-06-05 20:12:15 +02:00

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

Germano Cavalcante commented

2020-06-05 20:12:15 +02:00

I don't know if this is a limitation, but it makes sense the auto render in this situation.
So I'm confirming it as a bug.

I don't know if this is a limitation, but it makes sense the auto render in this situation. So I'm confirming it as a bug.

Philipp Oeser commented

2021-08-24 10:29:06 +02:00

Added subscribers: @MateuszWilinski, @lichtwerk

Philipp Oeser commented

2021-08-24 10:54:29 +02:00

I think I managed to break this one down a little further. Not sure whether to put this in a new bug report or not, let me know if I do. I'll put it here as well.

Think this ^^ is a crystal-clear bug (and I think this should be reported separately), because:

The way compo auto-re-render works at the moment is via the notifier system.
The Node Editor listens to ND_TRANSFORM_DONE and re-renders.
Animation system is completely ignored here. So I dont really think this is really a bug.
I know nowadays with Eevee, rendering can be fast and of course we could listen to more things (including framechange), so NC_SCENE | ND_FRAME could be considered, also most of NC_ANIMATION notifiers could be considered.
Like this for example:
P2339: T77349_snippet



diff --git a/source/blender/editors/space_node/space_node.c b/source/blender/editors/space_node/space_node.c
index 956fb3aa867..adea965c580 100644
--- a/source/blender/editors/space_node/space_node.c
+++ b/source/blender/editors/space_node/space_node.c
@@ -366,6 +366,11 @@ static void node_area_listener(const wmSpaceTypeListenerParams *params)
           break;
         }
         case ND_FRAME:
+          if (ED_node_is_compositor(snode)) {
+            if (snode->flag & SNODE_AUTO_RENDER) {
+              snode->runtime->recalc = true;
+            }
+          }
           ED_area_tag_refresh(area);
           break;
         case ND_COMPO_RESULT:

But this could possibly also be handled on the depsgraph side?

> I think I managed to break this one down a little further. Not sure whether to put this in a new bug report or not, let me know if I do. I'll put it here as well. Think this ^^ is a crystal-clear bug (and I think this should be reported separately), because: The way compo auto-re-render works at the moment is via the notifier system. The Node Editor listens to `ND_TRANSFORM_DONE` and re-renders. Animation system is completely ignored here. So I dont really think this is really a bug. I know nowadays with Eevee, rendering can be fast and of course we could listen to more things (including framechange), so `NC_SCENE | ND_FRAME` could be considered, also most of `NC_ANIMATION` notifiers could be considered. Like this for example: [P2339: T77349_snippet](https://archive.blender.org/developer/P2339.txt) ``` diff --git a/source/blender/editors/space_node/space_node.c b/source/blender/editors/space_node/space_node.c index 956fb3aa867..adea965c580 100644 --- a/source/blender/editors/space_node/space_node.c +++ b/source/blender/editors/space_node/space_node.c @@ -366,6 +366,11 @@ static void node_area_listener(const wmSpaceTypeListenerParams *params) break; } case ND_FRAME: + if (ED_node_is_compositor(snode)) { + if (snode->flag & SNODE_AUTO_RENDER) { + snode->runtime->recalc = true; + } + } ED_area_tag_refresh(area); break; case ND_COMPO_RESULT: ``` But this could possibly also be handled on the depsgraph side?

Philipp Oeser removed the

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Auto Render doesnt work with scene animations #77349