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Normal mapping results in artifacts when both mesh batching and precompute tangents options are enabled #2845

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QuantumCoderQC opened this issue Apr 7, 2023 · 0 comments
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bug This issue describes a bug

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Description
When both Batch Meshes and Precompute Tangents options are enabled, strange artefacts appear on the rendered mesh.

For example, consider a 2 X 2 arrangement of 4 identical grid mesh objects:
image

The meshes share the following material setup:
image

Either/ both options disabled Both options enabled
Correct: image Incorrect: image

Also, this issue does not happen if all the objects share the same mesh data (like linked duplicates).

To Reproduce
Run the provided blend file.

System
Blender: 3.3 LTS
Armory: SDK 2023.4
OS: Windows 10
Graphics card: Nvdia 2030

Test File
Mesh Batch Normal Mapping Tangents.zip

@QuantumCoderQC QuantumCoderQC added the bug This issue describes a bug label Apr 7, 2023
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