Regression: Cycles Baking time in 3.0.0 is higher compared to 2.93.7 #94854

New Issue

Memm · 2022-01-12T16:18:34+01:00

Memm commented

2022-01-12 16:18:34 +01:00

System Information
Operating system: Windows-10
Graphics card: NVIDIA GeForce GTX 960

Blender Version
Broken: version: 3.0.0
Worked: 2.93.5

Short description of error

Exact steps for others to reproduce the error
This follows my other issue which you can find here:
https://developer.blender.org/T94217

It's probably related, but adding this as a separate ticket.

big baking bug.blend

Open up the .blend file in 2.93.5, and press bake, it should have no problem baking. On my machine it uses about 1.8GB of RAM and starts baking within a few seconds, then bakes very quickly, less than a minute.

Then open it in 3.0.0 and press bake, on my machine the RAM shoots up to almost 7GB, then after maybe a minute it starts to bake, then gets stuck at 1% and I'm assuming Cycles crashes, Blender then needs to be killed with extreme prejudice.

This happens no matter what you're trying to bake, it's not just normal maps, it's ANY bake. At the moment ALL my baking has to be done in 2.93.5, before baking I have to close 3.0.0, open the file in 2.93.5 and hit bake.

**System Information** Operating system: Windows-10 Graphics card: NVIDIA GeForce GTX 960 **Blender Version** Broken: version: 3.0.0 Worked: 2.93.5 **Short description of error** **Exact steps for others to reproduce the error** This follows my other issue which you can find here: https://developer.blender.org/T94217 It's probably related, but adding this as a separate ticket. [big baking bug.blend](https://archive.blender.org/developer/F12802406/big_baking_bug.blend) Open up the .blend file in 2.93.5, and press bake, it should have no problem baking. On my machine it uses about 1.8GB of RAM and starts baking within a few seconds, then bakes very quickly, less than a minute. Then open it in 3.0.0 and press bake, on my machine the RAM shoots up to almost 7GB, then after maybe a minute it starts to bake, then gets stuck at 1% and I'm assuming Cycles crashes, Blender then needs to be killed with extreme prejudice. This happens no matter what you're trying to bake, it's not just normal maps, it's ANY bake. At the moment ALL my baking has to be done in 2.93.5, before baking I have to close 3.0.0, open the file in 2.93.5 and hit bake.

Memm commented

2022-01-12 16:18:34 +01:00

Added subscriber: @Memm

Erik Abrahamsson commented

2022-01-12 16:44:24 +01:00

Added subscriber: @erik85

Erik Abrahamsson commented

2022-01-12 16:44:24 +01:00

Works fine here.. yes a bit slow but it finished.
It took 30s with my GPU (GTX 1070) and 1min with CPU.

Works fine here.. yes a bit slow but it finished. It took 30s with my GPU (GTX 1070) and 1min with CPU.

Memm commented

2022-01-12 16:57:30 +01:00

@erik85 Can you compare that with 3.93.5? 3.0.0 also bakes here with CPU.

Erik Abrahamsson commented

2022-01-12 17:20:39 +01:00

In #94854#1287077, @Memm wrote:
@erik85 Can you compare that with 3.93.5? 3.0.0 also bakes here with CPU.

Around 16s on both CPU and GPU in 2.93.7

> In #94854#1287077, @Memm wrote: > @erik85 Can you compare that with 3.93.5? 3.0.0 also bakes here with CPU. Around 16s on both CPU and GPU in 2.93.7

Philipp Oeser commented

2022-01-14 12:40:07 +01:00

Added subscribers: @brecht, @lichtwerk

Philipp Oeser commented

2022-01-14 12:40:07 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2022-01-14 12:40:07 +01:00

Can confirm the regression in baking times (similar to what @erik85 found).

What I cannot repro is the increased memory consumption [only difference I see is that 3.0 eats this in a spike whereas in 2.93.7 consumption rises more gradually].

@brecht : was the increased baking time expected?

Can confirm the regression in baking times (similar to what @erik85 found). What I cannot repro is the increased memory consumption [only difference I see is that 3.0 eats this in a spike whereas in 2.93.7 consumption rises more gradually]. @brecht : was the increased baking time expected?

Philipp Oeser changed title from ~~Baking is broken in 3.0.0~~ to Regression: Cycles Baking is in 3.0.0 is higher compared to 2.93.7

2022-01-14 12:40:51 +01:00

Philipp Oeser changed title from ~~Regression: Cycles Baking is in 3.0.0 is higher compared to 2.93.7~~ to Regression: Cycles Baking time in 3.0.0 is higher compared to 2.93.7

2022-01-24 11:20:39 +01:00

Philipp Oeser commented

2022-01-24 11:29:44 +01:00

There is actually a duplicate report, see #94467 (Cycles Baking: 3.x is much slower than 2.93), I have updated the report there with information from this report, but will merge these reports.

Philipp Oeser commented

2022-01-24 11:29:52 +01:00

Closed as duplicate of #94467

Philipp Oeser closed this issue

2022-01-24 11:29:52 +01:00

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Regression: Cycles Baking time in 3.0.0 is higher compared to 2.93.7 #94854