3.2 normalmap node broken in eevee #100377

New Issue

Julian Scott · 2022-08-12T19:15:15+02:00

Julian Scott commented

2022-08-12 19:15:15 +02:00

System Information
Operating system: Windows 10
Graphics card: RTX 2060

Blender Version
Broken: 3.2.2
Worked: 3.1

Change is noticeable since 80859a6cb2

Short description of error
The result of the Normal Map node is incorrect in Eevee.

Exact steps for others to reproduce the error
In empty scene:

new cube, set to smooth shading.
load or assemble (from a gradient texture) Normal Map onto the cube. It must be strong enough for warping to be noticeable.
plug into Tangeant Space Normal Map node, and view directly in material surface output
Set to Cycles render mode. Compare with Eevee (in either lookdev or by switching to eevee directly)

Or use provided sample file
normal_map_bug_3-2.blend.

The world space normal gradients visible on the cube are different.
The bug only appears to be on the Red channel of the normal map. (small scale tests can't reproduce the bug when the red channel only has neutral data)

**System Information** Operating system: Windows 10 Graphics card: RTX 2060 **Blender Version** Broken: 3.2.2 Worked: 3.1 Change is noticeable since 80859a6cb2 **Short description of error** The result of the Normal Map node is incorrect in Eevee. **Exact steps for others to reproduce the error** In empty scene: - new cube, set to smooth shading. - load or assemble (from a gradient texture) Normal Map onto the cube. It must be strong enough for warping to be noticeable. - plug into Tangeant Space Normal Map node, and view directly in material surface output - Set to Cycles render mode. Compare with Eevee (in either lookdev or by switching to eevee directly) Or use provided sample file [normal_map_bug_3-2.blend](https://archive.blender.org/developer/F13372179/normal_map_bug_3-2.blend). The world space normal gradients visible on the cube are different. The bug only appears to be on the Red channel of the normal map. (small scale tests can't reproduce the bug when the red channel only has neutral data) ![image.png](https://archive.blender.org/developer/F13372148/image.png) ![image.png](https://archive.blender.org/developer/F13372172/image.png)

Julian Scott commented

2022-08-12 19:15:15 +02:00

Added subscriber: @syborg64