# Objective
Allow prepass to run without ATTRIBUTE_NORMAL.
This is needed for custom materials with non-standard vertex attributes.
For example a voxel material with manually packed vertex data.
Fixes#13054.
This PR covers the first part of the **stale** PR #13569 to only focus
on fixing #13054.
## Solution
- Only push normals `vertex_attributes` when the layout contains
`Mesh::ATTRIBUTE_NORMAL`
## Testing
- Did you test these changes? If so, how?
**Tested the fix on my own project with a mesh without normal
attribute.**
- Are there any parts that need more testing?
**I don't think so.**
- How can other people (reviewers) test your changes? Is there anything
specific they need to know?
**Prepass should not be blocked on a mesh without normal attributes
(with or without custom material).**
- If relevant, what platforms did you test these changes on, and are
there any important ones you can't test?
**Probably irrelevant, but Windows/Vulkan.**
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