Fix MODEL_DIR error

app.py

@@ -35,6 +35,18 @@ def select_model():
     return MODEL_DIR, MODEL_NAME, FILE_ID
 
 
+st.title("DietNeRF")
+caption = (
+    "Diet-NeRF achieves SoTA few-shot learning capacity in 3D model reconstruction. "
+    "Thanks to the 2D supervision by CLIP (aka semantic loss), "
+    "it can render novel and challenging views with ONLY 8 training images, "
+    "outperforming original NeRF!"
+)
+st.markdown(caption)
+st.markdown("")
+MODEL_DIR, MODEL_NAME, FILE_ID = select_model()
+
+
 @st.cache
 def download_model():
     os.makedirs(MODEL_DIR, exist_ok=True)
@@ -71,17 +83,6 @@ radius = st.sidebar.slider(
     "Radius", min_value=2.0, max_value=6.0, step=1.0, value=3.0, help="Distance between object and the viewer"
 )
 
-st.title("DietNeRF")
-caption = (
-    "Diet-NeRF achieves SoTA few-shot learning capacity in 3D model reconstruction. "
-    "Thanks to the 2D supervision by CLIP (aka semantic loss), "
-    "it can render novel and challenging views with ONLY 8 training images, "
-    "outperforming original NeRF!"
-)
-st.markdown(caption)
-st.markdown("")
-MODEL_DIR, MODEL_NAME, FILE_ID = select_model()
-
 st.markdown("")
 
 with st.spinner("Rendering Image, it may take 2-3 mins. So, why don't you read our report in the meantime"):