Holdout function not working properly #73309

New Issue

Konventas · 2020-01-22T07:12:37+01:00

Konventas commented

2020-01-22 07:12:37 +01:00

System Information
Operating system: WINDOWS 10
Graphics card: NVIDIA RTX 2060ti

Blender Version
Broken: (Blender v. 2.81a)
Worked: (Worked only on blender 2.79b)

Short description of error
When you want to render some layers with holdout and when combine it into photoshop or node editor, there are 1px gap between two layers, and everything looks like have line around objects. It seems that object rendered with holdout function is 1 px smaller. If I need to change only one object color I can not render it with holdout alone, I need to re-render all the scene. With shadow catcher is the same, you can not render shadow in different layer and holdout all objects in it, they will not stick nicely in composer.
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

**System Information** Operating system: WINDOWS 10 Graphics card: NVIDIA RTX 2060ti **Blender Version** Broken: (Blender v. 2.81a) Worked: (Worked only on blender 2.79b) **Short description of error** When you want to render some layers with holdout and when combine it into photoshop or node editor, there are 1px gap between two layers, and everything looks like have line around objects. It seems that object rendered with holdout function is 1 px smaller. If I need to change only one object color I can not render it with holdout alone, I need to re-render all the scene. With shadow catcher is the same, you can not render shadow in different layer and holdout all objects in it, they will not stick nicely in composer. **Exact steps for others to reproduce the error** Based on the default startup or an attached .blend file (as simple as possible). ![Capture.JPG](https://archive.blender.org/developer/F8294000/Capture.JPG) ![3.jpg](https://archive.blender.org/developer/F8294004/3.jpg) ![2.jpg](https://archive.blender.org/developer/F8294003/2.jpg)

Konventas commented

2020-01-22 07:12:37 +01:00

Added subscriber: @indijus

Jacques Lucke commented

2020-01-22 11:23:32 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-01-22 11:23:32 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Jacques Lucke commented

2020-01-22 11:23:32 +01:00

Please provide an as-simple-as-possible .blend file that allows us to reproduce the issue more easily.

Also try the latest builds from the buildbot, please. https://builder.blender.org/download/

Please provide an as-simple-as-possible .blend file that allows us to reproduce the issue more easily. Also try the latest builds from the buildbot, please. https://builder.blender.org/download/

Konventas commented

2020-01-22 12:11:29 +01:00

simple scene.blend If you want to holdout shadow in one layer and hold out the bed in another layer, after combining they have 1px line around the bed and the shadow. Maybe it is anti aliasing problems. If you need to tweak shadow or change shadow color, you should render it without background, because holdout bed from shadow will not work. But if shadow is with background and not transparent as shadow catch I will not able to manipulate shadows different from the bed

[simple scene.blend](https://archive.blender.org/developer/F8294543/simple_scene.blend) If you want to holdout shadow in one layer and hold out the bed in another layer, after combining they have 1px line around the bed and the shadow. Maybe it is anti aliasing problems. If you need to tweak shadow or change shadow color, you should render it without background, because holdout bed from shadow will not work. But if shadow is with background and not transparent as shadow catch I will not able to manipulate shadows different from the bed

Konventas commented

2020-01-22 12:14:07 +01:00

![Capture3.JPG](https://archive.blender.org/developer/F8294673/Capture3.JPG) ![Capture7.JPG](https://archive.blender.org/developer/F8294672/Capture7.JPG)

Jacques Lucke commented

2020-01-22 12:15:59 +01:00

How can you call a scene with 473 MB "simple" :D
Please try to reproduce this in a much smaller file, preferably starting from a new empty file.

Otherwise debugging this issue becomes much harder.

Is this only related to cycles?

How can you call a scene with 473 MB "simple" :D Please try to reproduce this in a much smaller file, preferably starting from a new empty file. Otherwise debugging this issue becomes much harder. Is this only related to cycles?

Konventas commented

2020-01-23 09:28:02 +01:00

The main problem is when you holdout some object it makes jittering around the object cutting. When you want to combine shadow with holdout object you will get 1px strokes around any object if it is contain transparent layer. I posted it to blender artist group on Facebook and people tested it a lot, and everybody have the same problem. If you want to work with layers you can not use holdout button because it will cut object without anti aliasing and in post production objects not sticking nicely together. I do not work with eevee so I got this only on Cycles. tested beta versions it is the same. It is like on older blender 2.79 when you tried to use ID object index or material ant they do not contained anti aliasing. Cryptomatte not working for such situation if you want to render only one object with different patterns and cut out everything what is not important for rendering. You can render shadow in another pass layer, object in another ( In old 2.79 way layering), but you can not holdout perfectly shadow or object. So I do not understand why it is such function at all in layers menu. To look throw objects maybe in viewport, because in rendering it is not working, no anti aliasing and so much jittering around cutted objects in transparent backgrounds. I am not programmer so it is hard to explain it correctly but maybe someone will understand it :)

Konventas commented

2020-01-23 09:33:19 +01:00

![beta.JPG](https://archive.blender.org/developer/F8296588/beta.JPG)

Dalai Felinto commented

2020-02-06 14:28:15 +01:00

Added subscriber: @dfelinto

Dalai Felinto commented

2020-02-06 14:28:15 +01:00

Changed status from 'Needs User Info' to: 'Archived'

Dalai Felinto closed this issue

2020-02-06 14:28:15 +01:00

Dalai Felinto self-assigned this 2020-02-06 14:28:15 +01:00

Dalai Felinto commented

2020-02-06 14:28:15 +01:00

@indijus thanks for the report. But we have not the resources to debug production files.

Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

If you manage to isolate the issue and simplify the file further, please submit as a new bug report.

@indijus thanks for the report. But we have not the resources to debug production files. Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly. If you manage to isolate the issue and simplify the file further, please submit as a new bug report.

Stanislav Landgren commented

2022-02-20 12:41:01 +01:00

Added subscriber: @stanland

Stanislav Landgren commented

2022-02-20 12:41:01 +01:00

Hi,

I have the same problem. I made a very simple blend and photoshop file to test this issue. I think this problem is related to antialiasing.
HOLDOUT_TEST.blend

Hi, I have the same problem. I made a very simple blend and photoshop file to test this issue. I think this problem is related to antialiasing. [HOLDOUT_TEST.blend](https://archive.blender.org/developer/F12878392/HOLDOUT_TEST.blend) ![Holdout_Test.psb](https://archive.blender.org/developer/F12878395/Holdout_Test.psb)

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

Holdout function not working properly #73309