> For the complete documentation index, see [llms.txt](https://ica.gitbook.io/ica-skinned-mesh-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ica.gitbook.io/ica-skinned-mesh-docs/limitations.md).

# Limitations

## Current Caveats <a href="#current-caveats" id="current-caveats"></a>

* Only float2 UVs supported.\*
* Motion Vectors supported on Unity 6 and later.\*\*
* Normal recompute tangent is is equivalent of “legacy with split tangents” and not “mikktspace”.
* Normal recompute does not support for sharp edges.
* Ica Skinner has higher Vram usage than SMR. \*\*
* Nothing is cached in pre built, this results higher startup initialization time. \*\*
* Ica Skinner has different performance characteristics (could be better or worse) \*\*
* Runtime API is not stable \*
* Not all SMR api methods provided in Ica Skinner \*
* Verlet Physics still in experimental state \*
* Tension compute still in experimental state \*
* Shear transform (happens when multiple non-uniform scaling in a transform chain) only supported by LBS mode.

(\*) Planned to be fixed or improved.&#x20;

(\*\*) These unlikely to be fixed unless Unity has better API.