diff --git a/nerfstudio/models/nerfacto.py b/nerfstudio/models/nerfacto.py
index 11adadbd7..4e619ad21 100644
--- a/nerfstudio/models/nerfacto.py
+++ b/nerfstudio/models/nerfacto.py
@@ -67,7 +67,7 @@ class NerfactoModelConfig(ModelConfig):
     """How far along the ray to start sampling."""
     far_plane: float = 1000.0
     """How far along the ray to stop sampling."""
-    background_color: Literal["background", "last_sample"] = "last_sample"
+    background_color: Literal["random", "last_sample"] = "last_sample"
     """Whether to randomize the background color."""
     num_levels: int = 16
     """Number of levels of the hashmap for the base mlp."""
@@ -75,8 +75,8 @@ class NerfactoModelConfig(ModelConfig):
     """Maximum resolution of the hashmap for the base mlp."""
     log2_hashmap_size: int = 19
     """Size of the hashmap for the base mlp"""
-    num_proposal_samples_per_ray: Tuple[int] = (256, 96)
-    """Number of samples per ray for the proposal network."""
+    num_proposal_samples_per_ray: Tuple[int, ...] = (256, 96)
+    """Number of samples per ray for each proposal network."""
     num_nerf_samples_per_ray: int = 48
     """Number of samples per ray for the nerf network."""
     proposal_update_every: int = 5
diff --git a/scripts/exporter.py b/scripts/exporter.py
index 658d5e191..175cee187 100644
--- a/scripts/exporter.py
+++ b/scripts/exporter.py
@@ -57,7 +57,7 @@ class ExportPointCloud(Exporter):
     bounding_box_min: Tuple[float, float, float] = (-1, -1, -1)
     """Minimum of the bounding box, used if use_bounding_box is True."""
     bounding_box_max: Tuple[float, float, float] = (1, 1, 1)
-    """Minimum of the bounding box, used if use_bounding_box is True."""
+    """Maximum of the bounding box, used if use_bounding_box is True."""
     num_rays_per_batch: int = 32768
     """Number of rays to evaluate per batch. Decrease if you run out of memory."""
     std_ratio: float = 10.0
@@ -314,18 +314,20 @@ class ExportMarchingCubesMesh(Exporter):
         raise NotImplementedError("Marching cubes not implemented yet.")
 
 
-Commands = Union[
-    Annotated[ExportPointCloud, tyro.conf.subcommand(name="pointcloud")],
-    Annotated[ExportTSDFMesh, tyro.conf.subcommand(name="tsdf")],
-    Annotated[ExportPoissonMesh, tyro.conf.subcommand(name="poisson")],
-    Annotated[ExportMarchingCubesMesh, tyro.conf.subcommand(name="marching-cubes")],
+Commands = tyro.conf.FlagConversionOff[
+    Union[
+        Annotated[ExportPointCloud, tyro.conf.subcommand(name="pointcloud")],
+        Annotated[ExportTSDFMesh, tyro.conf.subcommand(name="tsdf")],
+        Annotated[ExportPoissonMesh, tyro.conf.subcommand(name="poisson")],
+        Annotated[ExportMarchingCubesMesh, tyro.conf.subcommand(name="marching-cubes")],
+    ]
 ]
 
 
 def entrypoint():
     """Entrypoint for use with pyproject scripts."""
     tyro.extras.set_accent_color("bright_yellow")
-    tyro.cli(tyro.conf.FlagConversionOff[Commands]).main()
+    tyro.cli(Commands).main()
 
 
 if __name__ == "__main__":