Fix use_appearance_embedding for instant-ngp (#1999)

* Attempt fixes for instant-ngp

* Run `ns-dev-test`

* Remove NGP field implementation

* Test nerfacto field instead of ngp field

* Black

docs/reference/api/fields.rst

@@ -10,10 +10,45 @@ Base
    :members:
    :show-inheritance:
 
-Instant NGP
+Density
 ----------------
 
-.. automodule:: nerfstudio.fields.instant_ngp_field
+.. automodule:: nerfstudio.fields.density_fields
+   :members:
+   :show-inheritance:
+
+Nerfacto
+----------------
+
+.. automodule:: nerfstudio.fields.nerfacto_field
+   :members:
+   :show-inheritance:
+
+Nerf-W
+----------------
+
+.. automodule:: nerfstudio.fields.nerfw_field
+   :members:
+   :show-inheritance:
+
+SDF
+----------------
+
+.. automodule:: nerfstudio.fields.sdf_field
+   :members:
+   :show-inheritance:
+
+Semantic NeRF
+----------------
+
+.. automodule:: nerfstudio.fields.semantic_nerf_field
+   :members:
+   :show-inheritance:
+
+TensoRF
+----------------
+
+.. automodule:: nerfstudio.fields.tensorf_field
    :members:
    :show-inheritance: