Cycles Artefact / Never ending loop on prev. Multi lvl instancing. #72822

New Issue

Maciej Jutrzenka · 2019-12-31T17:37:24+01:00

Maciej Jutrzenka commented

2019-12-31 17:37:24 +01:00

System Information
Operating system: Linux-4.15.0-72-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce 610M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116

Blender Version
Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-27 20:38, hash: c2a37867f2
Worked: (optional)

Short description of error
I have multi level instanceing where i instance an instance etc.. Problem happens that when i render this.. it produce artefacts like missing data or clipped image. When i want to prev render in viewport.. it makes 1 sample and after that it automaticly refresh like i would change some data.. and it stays in that loop forever.

Exact steps for others to reproduce the error
Fire up prev render mode in viewport. look that it never goes beyond 1 sample it stays in loop like there is some loop of data refreshing. And When u Render F12 it produce artefacts.. The whole project have only emission shader.. no HDRI etc. so there should be absolutly no noise not only we have noise we also have lack of proper data.

forged_carbon.blend

**System Information** Operating system: Linux-4.15.0-72-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce 610M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116 **Blender Version** Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-27 20:38, hash: `c2a37867f2` Worked: (optional) **Short description of error** I have multi level instanceing where i instance an instance etc.. Problem happens that when i render this.. it produce artefacts like missing data or clipped image. When i want to prev render in viewport.. it makes 1 sample and after that it automaticly refresh like i would change some data.. and it stays in that loop forever. **Exact steps for others to reproduce the error** Fire up prev render mode in viewport. look that it never goes beyond 1 sample it stays in loop like there is some loop of data refreshing. And When u Render F12 it produce artefacts.. The whole project have only emission shader.. no HDRI etc. so there should be absolutly no noise not only we have noise we also have lack of proper data. ![Zrzut ekranu z 2019-12-31 17-32-42.png](https://archive.blender.org/developer/F8253560/Zrzut_ekranu_z_2019-12-31_17-32-42.png) ![Zrzut ekranu z 2019-12-31 17-33-12.png](https://archive.blender.org/developer/F8253559/Zrzut_ekranu_z_2019-12-31_17-33-12.png) [forged_carbon.blend](https://archive.blender.org/developer/F8253563/forged_carbon.blend)

Maciej Jutrzenka commented

2019-12-31 17:37:24 +01:00

Added subscriber: @MaciejJutrzenka

Jacques Lucke commented

2020-01-14 13:03:59 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-01-14 13:03:59 +01:00

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

Jacques Lucke commented

2020-01-14 13:03:59 +01:00

I think I can reproduce the issue. However, please try to simplify the file even more to make it easier to debug. It should have as few stuff in it as possible while still showing the issue.

Brecht Van Lommel commented

2020-01-18 18:23:38 +01:00

Closed as duplicate of #50166

Brecht Van Lommel closed this issue

2020-01-18 18:23:38 +01:00

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Cycles Artefact / Never ending loop on prev. Multi lvl instancing. #72822