Cell Fracture doesn't apply materials properly to interior/exterior faces in Blender 4 #105231

New Issue

VadimA · 2024-03-11T22:11:07+01:00

VadimA commented

2024-03-11 22:11:07 +01:00

When applying Cell Fracture to the default subdivided cube (or any other mesh actually), all faces end up using the same interior material instead of different materials for interior/exterior faces. Was testing this in Blender 3.0.1 and everything works fine (see attachment - Blender 3 on the left, Blender 4 on the right).

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 4070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 546.17

Blender Version
Broken: version: 3.6.9, branch: blender-v3.6-release, commit date: 2024-02-19 16:48, hash: e958717a0c25
Worked: (newest version of Blender that worked as expected)

Addon Information
Name: Cell Fracture (0, 2)
Author: ideasman42, phymec, Sergey Sharybin

Short description of error
[Please fill out a short description of the error here]

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

When applying Cell Fracture to the default subdivided cube (or any other mesh actually), all faces end up using the same interior material instead of different materials for interior/exterior faces. Was testing this in Blender 3.0.1 and everything works fine (see attachment - Blender 3 on the left, Blender 4 on the right). **System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 4070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 546.17 **Blender Version** Broken: version: 3.6.9, branch: blender-v3.6-release, commit date: 2024-02-19 16:48, hash: `e958717a0c25` Worked: (newest version of Blender that worked as expected) **Addon Information** Name: Cell Fracture (0, 2) Author: ideasman42, phymec, Sergey Sharybin **Short description of error** [Please fill out a short description of the error here] **Exact steps for others to reproduce the error** [Please describe the exact steps needed to reproduce the issue] [Based on the default startup or an attached .blend file (as simple as possible)]

Screenshot 2024-03-11 233539.png

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VadimA added the

labels 2024-03-11 22:11:07 +01:00

Cedric Steiert commented

2024-06-30 13:16:53 +02:00

Tbh i can't see any notable difference between blender 3.6 and 4.0. According to your report blender 3.6 works fine whilst 4.0 does not.
I used Object > Quick Effects > Cell Fracture to test.

Blender 3.6.4:

Blender 4.0.2:

Blender 4.1.0:

Make sure you are using the correct material index in the fracture settings:

If this issue still occurs please provide a sample .blend file and try a factory reset first.

Tbh i can't see any notable difference between blender 3.6 and 4.0. According to your report blender 3.6 works fine whilst 4.0 does not. I used `Object > Quick Effects > Cell Fracture` to test. Blender 3.6.4: <img src="/attachments/30cf8833-d195-4246-918c-040ef4a0c0d4" width="200"> Blender 4.0.2: <img src="/attachments/d29d6083-9cc2-4943-8bf8-17b58f93944c" width="200"> Blender 4.1.0: <img src="/attachments/e8e00dbf-8ac9-4b5a-a84b-d0822d0109ce" width="200"> Make sure you are using the correct material index in the fracture settings: <img src="/attachments/76af0964-2b00-4107-bcfa-2692856acbf7" width="300"> If this issue still occurs please provide a sample `.blend` file and try a factory reset first.

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