[BLOCKING] Assertion failed: Error: Mesh vertex format doesn't match material's vertexfields for material entity_alphablend.skinning Material

*Partner Rank:*

1

*Partner Team Reporting:*

Everbloom Studios

*Verification builds:*

1.13.0.12 (there's currently no Release builds to test this in later versions), happens in 1.12 builds as well.

*Summary:*

An assert failure is occurring when an entity with a certain material/model/texture comes into view.

Assert Failure - ctrl+C to copy this message to the clipboard! --------------------------- Assertion failed: Error: Mesh vertex format doesn't match material's vertexfields for material entity_alphablend.skinning Material : Size: 24, POSITION = 0; COLOR = 8; NORMAL = 12; TEXCOORD_0 = 16; BONEID_0 = 20 Mesh: Size: 20, POSITION = 0; NORMAL = 8; TEXCOORD_0 = 12; BONEID_0 = 16 @ mce::RenderMaterial::useWith Function: in f:\darwinwork\20\s\handheld\src-deps\minecraftrenderer\src\renderer\rendermaterial.cpp @ 73 --------------------------- OK ---------------------------

*Impact:*

This assert failure is preventing us from releasing a piece of content, and is also occurring in another piece of content of ours in development.

*Repro Steps:*

1. Create and join the provided world with asserts on.
2. Run the following command to spawn the custom entity with this command: /summon misc:ice_block

*Observed Results:*

An assert failure occurs with the message above. The game continues if "Asserts break in the debugger" is disabled.

If the game doesn't close after this assert, it doesn't seem to appear again unless the game is rebooted.

*Expected Results:*

No assert should occur.

*Screenshots/Videos attached: Yes/No*

No

*Regression Builds:*

Unknown