Model import failing 'Can only merge simple MeshDrawData'
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- Dominant language
- C#
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Description
Release Type: Official Release
Version: 4.2.0.2149 and up (tested until 4.2.0.2188)
Platform(s): Windows
Describe the bug
During compilation, the asset compiler fails with [AssetCompiler] Unexpected error while importing model [HighDefinitonModels/MyModelName] from import [C:/Resources/MyModelName.fbx]. Exception: InvalidOperationException: Can only merge simple MeshDrawData.
To Reproduce
Steps to reproduce the behavior:
Import the following model with the import option No skeleton.
Model.zip
Screenshots
Additional context
This worked in version 4.2.0.2188 and lower.
Importing only fails on some models, like the one included above.
If I import the model with the skeleton, everything seems to work fine.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the attached Model.zip and reproduce the import using the No skeleton option on Windows, noting the AssetCompiler exception. Compare that path with importing the same model with a skeleton and with the versions identified in the report. Done means the affected model imports without the “Can only merge simple MeshDrawData” failure while the working skeleton path remains intact.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- game-dev, tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100