Combined pass renders even if deselected #46326

New Issue

Ralph Biggins · 2015-09-30T09:20:20+02:00

Ralph Biggins commented

2015-09-30 09:20:20 +02:00

Dell i7 - 3450M
Windows 7 Enterprise SP1
tested on various other computers

Blender 2.75

When rendering a scene, the combined pass is rendered even if it is deselected. In this case only the AO pass was required and selected.
If the combined pass is required for the other passes, then it should be removed from the list or clarified by not allowing the user to deselect it.

Steps:
Open blend file (any, basic scene)
In passes, select AO, deselect Z and combined

rendering this will render the combined and AO pass

in node editor: compositor, connect render layers:AO (render layers:combined is not on the node) to composite:image

rendering will render the combined pass, and then display as output the AO pass.startup.blend

Dell i7 - 3450M Windows 7 Enterprise SP1 tested on various other computers Blender 2.75 When rendering a scene, the combined pass is rendered even if it is deselected. In this case only the AO pass was required and selected. If the combined pass is required for the other passes, then it should be removed from the list or clarified by not allowing the user to deselect it. Steps: Open blend file (any, basic scene) In passes, select AO, deselect Z and combined - rendering this will render the combined and AO pass in node editor: compositor, connect render layers:AO (render layers:combined is not on the node) to composite:image - rendering will render the combined pass, and then display as output the AO pass.[startup.blend](https://archive.blender.org/developer/F241093/startup.blend)

Ralph Biggins commented

2015-09-30 09:20:20 +02:00

Changed status to: 'Open'

Ralph Biggins commented

2015-09-30 09:20:20 +02:00

Added subscriber: @RalphBiggins

Sergey Sharybin commented

2015-09-30 09:28:31 +02:00

Added subscribers: @JulianEisel, @Sergey

Sergey Sharybin commented

2015-09-30 09:28:31 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2015-09-30 09:28:31 +02:00

Sergey Sharybin self-assigned this 2015-09-30 09:28:31 +02:00

Sergey Sharybin commented

2015-09-30 09:28:31 +02:00

I wouldn't consider this a bug. Blender Internal renderer can't skip doing combined pass at all. Cycles in theory can skip writting to combined pass but internally it'll still be doing all calculations needed for it so there'll be no performance gain.

Main reason of current behavior of combined pass is due to general approach to controlling render passes and some render engines might respect settings and some might ignore them.

I can see how it might be confusing, but wouldn't really consider a bug. Maybe good to place this to @JulianEisel radars for gaining some bifgger interface picture for improvement.

So thanks for the report, but closing as a TODO.

I wouldn't consider this a bug. Blender Internal renderer can't skip doing combined pass at all. Cycles in theory can skip writting to combined pass but internally it'll still be doing all calculations needed for it so there'll be no performance gain. Main reason of current behavior of combined pass is due to general approach to controlling render passes and some render engines might respect settings and some might ignore them. I can see how it might be confusing, but wouldn't really consider a bug. Maybe good to place this to @JulianEisel radars for gaining some bifgger interface picture for improvement. So thanks for the report, but closing as a TODO.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Combined pass renders even if deselected #46326