Cycles: Intensity of rendered bump maps are different than Blender 3.5 and older version's renders. #110271

New Issue

Satoshi Yamasaki · 2023-07-19T18:08:02+02:00

Satoshi Yamasaki commented

2023-07-19 18:08:02 +02:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 531.79

Blender Version
Broken: version: 3.6.0, branch: blender-v3.6-release, commit date: 2023-06-27 08:08, hash: c7fc78b81ecb and later (includes 4.0 alpha)
Worked: 3.5.1 and older

Behavior changed in dfe7b839bc

Short description of error
Cycles for 3.6 renders bump maps stronger than 3.5 render.
Eevee's render has not different at least in the attached file.

Exact steps for others to reproduce the error

Download the uploaded blend fille below
Load and render it with both Blender 3.5 and 3.6.

Thanks,

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 531.79 **Blender Version** Broken: version: 3.6.0, branch: blender-v3.6-release, commit date: 2023-06-27 08:08, hash: `c7fc78b81ecb` and later (includes 4.0 alpha) Worked: 3.5.1 and older Behavior changed in dfe7b839bca6a66c3eefa2b5968c061b425e2df1 **Short description of error** Cycles for 3.6 renders bump maps stronger than 3.5 render. Eevee's render has not different at least in the attached file. **Exact steps for others to reproduce the error** 1) Download the uploaded blend fille below 2) Load and render it with both Blender 3.5 and 3.6. Thanks,

350-360Bump.png

81 KiB

BumpTest.blend

976 KiB

Satoshi Yamasaki added the

labels 2023-07-19 18:08:02 +02:00

YimingWu commented

2023-07-20 04:39:37 +02:00

May be related but not exactly the same: #98122 #107930 #107579

❤️ 1

Philipp Oeser commented

2023-07-20 10:11:26 +02:00

Can confirm, will check if this is intended behavior

👍 1

Philipp Oeser added

and removed

labels 2023-07-20 10:11:34 +02:00

Philipp Oeser commented

2023-07-20 10:52:11 +02:00

Behavior changed in dfe7b839bc

So my assumption is that this is actually a fix and the new behavior is the intended behavior.

Do you agree @weizhen ?

Behavior changed in dfe7b839bca6a66c3eefa2b5968c061b425e2df1 So my assumption is that this is actually a fix and the new behavior is the intended behavior. Do you agree @weizhen ?

Philipp Oeser added

Module

Render & Cycles

Status

Needs Info from Developers

and removed

Status

Confirmed

labels 2023-07-20 10:52:37 +02:00

Weizhen Huang commented

2023-07-20 11:04:20 +02:00

Yes, this behavior is intentional. We try to adjust the shading normal slightly if the reflection might go under the surface, so that the result does not get overly dark, but sometimes people do want a pronounced tilt of normal, our trick shouldn't be applied in that case. dfe7b839bc is kind of a temp fix, it was not ideal but also no time to find a better solution.
Currently in Cycles the normal lifting trick is only applied on glossy surfaces, as far as I know this behavior matches EEVEE.

Yes, this behavior is intentional. We try to adjust the shading normal slightly if the reflection might go under the surface, so that the result does not get overly dark, but sometimes people do want a pronounced tilt of normal, our trick shouldn't be applied in that case. dfe7b839bc is kind of a temp fix, it was not ideal but also no time to find a better solution. Currently in Cycles the normal lifting trick is only applied on glossy surfaces, as far as I know this behavior matches EEVEE.

👍 1

Philipp Oeser commented

2023-07-20 11:16:21 +02:00

At least in this case, cycles matches eevee in that regard, yes (which was not the case before dfe7b839bc).

That means this report can be closed.

Also note this has been mentioned in the release logs:
https://wiki.blender.org/wiki/Reference/Release_Notes/3.6/Cycles
#105776

At least in this case, cycles matches eevee in that regard, yes (which was not the case before dfe7b839bc). That means this report can be closed. Also note this has been mentioned in the release logs: https://wiki.blender.org/wiki/Reference/Release_Notes/3.6/Cycles https://projects.blender.org/blender/blender/pulls/105776

Philipp Oeser closed this issue

2023-07-20 11:16:24 +02:00

Blender Bot added

Status

Archived

and removed

Status

Needs Info from Developers

labels 2023-07-20 11:16:59 +02:00

Theo Bouvier referenced this issue

2023-07-20 13:10:48 +02:00

Light clamping from Normal or Bump maps near shadow terminator in Cycles #107579

Satoshi Yamasaki commented

2023-07-20 16:25:23 +02:00

Also note this has been mentioned in the release logs:

I missed it, but It would be noticed harder because it was added after the release...

Anyway, thank you guys!

> Also note this has been mentioned in the release logs: I missed it, but It would be noticed harder because it was added after the release... Anyway, thank you guys!

Philipp Oeser referenced this issue

2023-08-07 11:14:00 +02:00

3.6.1 cycles light tree will cause normal map looks not right #110674

Philipp Oeser referenced this issue

2023-08-22 17:41:07 +02:00

3.6.1 cycles light tree will cause normal map looks not right #110674

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