The code wrongly used the `ob_eval->data` to try and get the `GreasePencil` data. The `ob_eval` only needs to be used to access the transform to get the `layer.to_world_space`
The code wrongly used the `ob_eval->data` to try and get the `GreasePencil` data. The `ob_eval` only needs to be used to access the transform to get the `layer.to_world_space`