render lagging behind tiles #71641

New Issue

HF · 2019-11-17T02:45:28+01:00

HF commented

2019-11-17 02:45:28 +01:00

System Information
Operating system: win10
Graphics card:rts 2070 super

Blender Version
2.81
Short description of error
when rendering, the picture doesnt appear for a while after the render tile already finished rendering that region, not sure if its a bug. didn't see anything like this online. here is a video

Exact steps for others to reproduce the error

bug (2).blend

Open file and render

gnVknluHJZ.mp4

**System Information** Operating system: win10 Graphics card:rts 2070 super **Blender Version** 2.81 **Short description of error** when rendering, the picture doesnt appear for a while after the render tile already finished rendering that region, not sure if its a bug. didn't see anything like this online. here is a video **Exact steps for others to reproduce the error** [bug (2).blend](https://archive.blender.org/developer/F8144833/bug__2_.blend) - Open file and render [gnVknluHJZ.mp4](https://archive.blender.org/developer/F8111468/gnVknluHJZ.mp4)

HF commented

2019-11-17 02:45:28 +01:00

Added subscriber: @Hongyu

Philipp Oeser commented

2019-11-19 12:13:29 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-11-19 12:13:29 +01:00

Cannot reproduce here

Just to make sure we are all on the same page:

could you share your .blend file?
does this only happen on the RTX? (could you check on other computers?)
does optix vs. cuda make a difference?

Cannot reproduce here Just to make sure we are all on the same page: - could you share your .blend file? - does this only happen on the RTX? (could you check on other computers?) - does optix vs. cuda make a difference?

HF commented

2019-11-19 20:33:31 +01:00

{F8144833}it happens on both optix and cuda here is a blend file

Btw it also happens on 2.80

{[F8144833](https://archive.blender.org/developer/F8144833/bug__2_.blend)}it happens on both optix and cuda here is a blend file Btw it also happens on 2.80

Jacques Lucke commented

2020-01-08 15:39:52 +01:00

Added subscribers: @Stefan_Werner, @JacquesLucke

Jacques Lucke commented

2020-01-08 15:39:52 +01:00

I can reproduce it on the CPU with a single thread (and reduced samples/tile size). It only seems to happen when Denoising Data is enabled. I'm not exactly sure how it works, but it looks like it is doing some preprocessing on some tiles before actually starting to render them, don't know exactly.

2020-01-08 15-38-23.mp4

Note, there is also a texture file missing in the .blend file, but that is probably unrelated.

@Stefan_Werner do you know what is happening here?

I can reproduce it on the CPU with a single thread (and reduced samples/tile size). It only seems to happen when Denoising Data is enabled. I'm not exactly sure how it works, but it looks like it is doing some preprocessing on some tiles before actually starting to render them, don't know exactly. [2020-01-08 15-38-23.mp4](https://archive.blender.org/developer/F8266077/2020-01-08_15-38-23.mp4) Note, there is also a texture file missing in the .blend file, but that is probably unrelated. @Stefan_Werner do you know what is happening here?

Richard Antalik commented

2020-01-16 14:47:58 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-01-16 14:47:58 +01:00

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

Richard Antalik commented

2020-01-16 14:47:58 +01:00

I can confirm this on win10, Radeon RX 550, GPU or CPU OpenCL

Bastien Montagne commented

2020-01-20 20:41:50 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2020-01-20 20:41:50 +01:00

Would make sense that denoising requires some post-processing time after render itself is done? Fairly sure there is no bug here, but would rather leave final decision to @Stefan_Werner or some other #Cycles team member indeed.

Would make sense that denoising requires some post-processing time *after* render itself is done? Fairly sure there is no bug here, but would rather leave final decision to @Stefan_Werner or some other #Cycles team member indeed.

Philipp Oeser removed the

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

render lagging behind tiles #71641