Regression: Wrong normalmaps on scaled objects #98251

New Issue

Malcolm Reed · 2022-05-19T11:07:01+02:00

Malcolm Reed commented

2022-05-19 11:07:01 +02:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.68

Blender Version
Broken: version: 3.2.0 Beta, branch: master, commit date: 2022-05-16 16:16, hash: a2dacefb46
Worked: 3.1.2

Caused by 80859a6cb2

Short description of error
Wrong normalmaps on scaled objects

Exact steps for others to reproduce the error
#98251.blend

open blend (two spheres of equal dimensions but different object scale)
observe the normalmap on the scaled sphere renders wrong

{F13093943 size=full}

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.68 **Blender Version** Broken: version: 3.2.0 Beta, branch: master, commit date: 2022-05-16 16:16, hash: `a2dacefb46` Worked: 3.1.2 Caused by 80859a6cb2 **Short description of error** Wrong normalmaps on scaled objects **Exact steps for others to reproduce the error** [#98251.blend](https://archive.blender.org/developer/F13093950/T98251.blend) - open blend (two spheres of equal dimensions but different object scale) - observe the normalmap on the scaled sphere renders wrong {[F13093943](https://archive.blender.org/developer/F13093943/image.png) size=full}

Malcolm Reed commented

2022-05-19 11:07:01 +02:00

Added subscriber: @reed2000

blender-admin commented

2022-05-19 11:07:01 +02:00

#98343 was marked as duplicate of this issue

blender-admin commented

2022-05-19 11:07:01 +02:00

#98301 was marked as duplicate of this issue

Philipp Oeser commented

2022-05-19 16:18:01 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-05-19 16:18:01 +02:00

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

Philipp Oeser commented

2022-05-19 16:18:01 +02:00

Got an example .blend file to reproduce?

Malcolm Reed commented

2022-05-19 17:48:14 +02:00

Sure, here is a very simple example with a material on a sphere. I packed the texture so hopefully it's all there.

There is an FBX in the zip file.
It's already been imported into the scene.
I provided a screenshot of what I see.

Cheers.
fbx_import.zip

Sure, here is a very simple example with a material on a sphere. I packed the texture so hopefully it's all there. There is an FBX in the zip file. It's already been imported into the scene. I provided a screenshot of what I see. Cheers. [fbx_import.zip](https://archive.blender.org/developer/F13090798/fbx_import.zip)

Philipp Oeser commented

2022-05-19 17:58:47 +02:00

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

Philipp Oeser commented

2022-05-20 11:31:10 +02:00

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

Philipp Oeser commented

2022-05-20 11:31:10 +02:00

Seems something changed in regards to normalmaps on scaled objects, the issue goes away if object scale is applied.
Still looks like a bug, will check

Seems something changed in regards to normalmaps on scaled objects, the issue goes away if object scale is applied. Still looks like a bug, will check

Philipp Oeser commented

2022-05-20 11:43:10 +02:00

Caused by 80859a6cb2

So it is really about normalmaps on scaled objects (and not directly related to FBX -- this just changes the scale upon export/import with certain settings), will update the report description accordingly.

Caused by 80859a6cb2 So it is really about normalmaps on scaled objects (and not directly related to FBX -- this just changes the scale upon export/import with certain settings), will update the report description accordingly.

Malcolm Reed commented

2022-05-20 11:46:36 +02:00

Ah yeah, we haven't needed to do that in previous Blender versions (apply the scale). So if it's not a new feature :)

Actually it's worse than we think, try scaling any object with a Normal map in that version, the effect of the normal map compounds if you scale down and lessens if you scale up. Definitely a bug or it means you can't use scaling other than 1.0 anymore. We know Blender is funny about scaling, but this a whole new level : )

Ah yeah, we haven't needed to do that in previous Blender versions (apply the scale). So if it's not a new feature :) Actually it's worse than we think, try scaling any object with a Normal map in that version, the effect of the normal map compounds if you scale down and lessens if you scale up. Definitely a bug or it means you can't use scaling other than 1.0 anymore. We know Blender is funny about scaling, but this a whole new level : )

Philipp Oeser commented

2022-05-20 11:49:06 +02:00

yeah, bug

Philipp Oeser changed title from ~~FBX import, material has strange normals~~ to Regression: Wrong normalmaps on scaled objects

2022-05-20 11:53:18 +02:00

Philipp Oeser commented

2022-05-20 11:53:38 +02:00

Added subscriber: @fclem