Bump in Eevee does not follow normal direction #63729

New Issue

Manda Rajoelisolo · 2019-04-19T12:31:04+02:00

Manda Rajoelisolo commented

2019-04-19 12:31:04 +02:00

System Information
Operating system: Windows 10 Pro 64-bit (10.0, Build 17763)
Graphics card: NVIDIA GeForce 920M

Blender Version
Broken: 2.80.45

Short description of error
The Bump Node in Cycles is inverted like a bug but the Bump Node in Eevee works very good.

Exact steps for others to reproduce the error
.blend file: Bug_on_cycles_bump.blend
(All textures are packed into the .blend file)
Step 1: Open the .blend file.
Step 2: Switch to Rendered, then you remark that the bump has no bug because it's in Eevee.
Step 3: Now, switch to Cycles Render Engine, then you remark that the bump (X) is inverted, and that's the bug.

I complicated the object into a round object in order to see well the object shading compared to the bump shading.

**System Information** Operating system: Windows 10 Pro 64-bit (10.0, Build 17763) Graphics card: NVIDIA GeForce 920M **Blender Version** Broken: 2.80.45 **Short description of error** The Bump Node in Cycles is inverted like a bug but the Bump Node in Eevee works very good. **Exact steps for others to reproduce the error** .blend file: [Bug_on_cycles_bump.blend](https://archive.blender.org/developer/F6959273/Bug_on_cycles_bump.blend) (All textures are packed into the .blend file) Step 1: Open the .blend file. Step 2: Switch to Rendered, then you remark that the bump has no bug because it's in Eevee. Step 3: Now, switch to Cycles Render Engine, then you remark that the bump (X) is inverted, and that's the bug. ![Eevee & Cycles.jpg](https://archive.blender.org/developer/F6959298/Eevee___Cycles.jpg) I complicated the object into a round object in order to see well the object shading compared to the bump shading.

Manda Rajoelisolo commented

2019-04-19 12:31:04 +02:00

Added subscriber: @manda.3d.projects

Brecht Van Lommel was assigned by Sebastian Parborg

2019-04-19 15:00:44 +02:00

Manda Rajoelisolo commented

2019-04-19 17:58:03 +02:00

It's the same problem with DISPLACEMENT in Cycles.

It's the same problem with DISPLACEMENT in Cycles. ![Inverted_Displacement.jpg](https://archive.blender.org/developer/F6959880/Inverted_Displacement.jpg)

Brecht Van Lommel changed title from ~~The bump in Cycles is inverted, but the bump in Eevee is OK.~~ to Bump in Eevee does not follow normals

2019-04-19 18:06:41 +02:00

Brecht Van Lommel removed their assignment 2019-04-19 18:06:48 +02:00

Clément Foucault was assigned by Brecht Van Lommel

2019-04-19 18:06:48 +02:00

Brecht Van Lommel commented

2019-04-19 18:06:48 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2019-04-19 18:08:07 +02:00

The bug is in Eevee in my opinion. The normals in this mesh are flipped to the inside, and I think the only reasonable thing for displacement to do is to follow them.

For bump mapping you can try do it based on which side the face is being viewed from, but then it can't be consistent with displacement.

The bug is in Eevee in my opinion. The normals in this mesh are flipped to the inside, and I think the only reasonable thing for displacement to do is to follow them. For bump mapping you can try do it based on which side the face is being viewed from, but then it can't be consistent with displacement.

Brecht Van Lommel changed title from ~~Bump in Eevee does not follow normals~~ to Bump in Eevee does not follow normal direction

2019-04-19 18:08:24 +02:00

Manda Rajoelisolo commented

2019-04-20 09:59:52 +02:00

You are right, I should never forget to recalculate Normals. If I don't do it then the render results in Eevee and Cycles are not identical.
But I cannot believe the problem happened to me 2 times, the first time was in my real project and the second time is in that .blend file.

You are right, I should never forget to recalculate Normals. If I don't do it then the render results in Eevee and Cycles are not identical. But I cannot believe the problem happened to me 2 times, the first time was in my real project and the second time is in that .blend file.

blender-admin commented

2019-06-06 19:32:43 +02:00

This issue was referenced by 76634a23bb

This issue was referenced by 76634a23bbf70e4b0be8fecfd6782820a856b5a7

Clément Foucault commented

2019-06-06 22:26:55 +02:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-06-06 22:26:55 +02:00

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Bump in Eevee does not follow normal direction #63729