diff --git a/configs/graph_default.yaml b/configs/graph_default.yaml
index 96c026198..42d5f5d4d 100644
--- a/configs/graph_default.yaml
+++ b/configs/graph_default.yaml
@@ -28,7 +28,7 @@ logging:
 trainer:
   model_dir: "./checkpoints"
   steps_per_save: 1000
-  steps_per_test: 1000
+  steps_per_test: 500
   max_num_iterations: 1000000
   mixed_precision: False
   resume_train:
diff --git a/configs/graph_mipnerf.yaml b/configs/graph_mipnerf.yaml
index 36bf3d015..f853daabf 100644
--- a/configs/graph_mipnerf.yaml
+++ b/configs/graph_mipnerf.yaml
@@ -14,11 +14,13 @@ data:
   dataset_inputs_train:
     _target_: nerfactory.data.datasets.Blender
     data_directory: data/blender/lego
+    alpha_color: white
     downscale_factor: 1
   # Eval dataloading
   dataset_inputs_eval:
     _target_: nerfactory.data.datasets.Blender
     data_directory: data/blender/lego
+    alpha_color: white
     downscale_factor: 1
 
 graph:
diff --git a/configs/graph_vanilla_nerf.yaml b/configs/graph_vanilla_nerf.yaml
index f0d3a7a29..59a866788 100644
--- a/configs/graph_vanilla_nerf.yaml
+++ b/configs/graph_vanilla_nerf.yaml
@@ -7,9 +7,11 @@ data:
   dataset_inputs_train:
     _target_: nerfactory.data.datasets.Blender
     data_directory: data/blender/lego
+    alpha_color: white
     downscale_factor: 1
   # Eval dataloading
   dataset_inputs_eval:
     _target_: nerfactory.data.datasets.Blender
     data_directory: data/blender/lego
+    alpha_color: white
     downscale_factor: 1