I was able to reproduce the reported problem. I noticed that there is a shader compiler error when building the asset bundles. Fixing the shader compilation error seems to fix the reported problem. Just add a return statement in `Packages\lilToon\Shader\lts.shader`, in the `struct v2f vert(struct appdata input)` function that is declared on line 642:

```
struct v2f vert(struct appdata input)
{
struct v2f output;
output.pos = float4(0,0,0,1);
output.col = float4(input.uv0, input.uv1) + float4(input.uv2, input.uv3);

return output; // <---- add this
}
```

Can you try this on your side and let us know if there is anything else blocking you from using the built asset bundles? Thanks