Meshes work improperly when they have vertices attached to too many bones

I created a round, tubular mesh, designed to be very smooth and bendy.
In order to do this, some of the vertices are constrained by up to 12 bones.

However, when I import this mesh into roblox, and move the bones into the correct positions, it looks like a hedgehog

Expected behavior

In blender, this works as intended. (ignore the broken normals, I’m new to blender)

A private message is associated with this bug report

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Max amount of bones assigned to single vertex is 4.

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Where is this documented? I looked but I couldn’t find anything.

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Hello, the answer from @GamEditoPro is correct. This documented for skinning under avatar spec
Character Specifications | Documentation - Roblox Creator Hub as well as general modeling specs General Specifications | Documentation - Roblox Creator Hub

Thank you for reaching out, please let reach if you have any questions :slight_smile:

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