Update app.py

app.py

@@ -309,18 +309,18 @@ Image model: [IllustriousXL v0.1](https://huggingface.co/OnomaAIResearch/Illustr
             with gr.Row():
                 width = gr.Slider(
                     label="Width",
-                    minimum=512,
+                    minimum=640,
                     maximum=MAX_IMAGE_SIZE,
-                    step=64,
-                    value=832,  # Replace with defaults that work for your model
+                    step=128,
+                    value=960,  # Replace with defaults that work for your model
                 )
 
                 height = gr.Slider(
                     label="Height",
-                    minimum=512,
+                    minimum=640,
                     maximum=MAX_IMAGE_SIZE,
-                    step=64,
-                    value=1152,  # Replace with defaults that work for your model
+                    step=128,
+                    value=1344,  # Replace with defaults that work for your model
                 )
 
             with gr.Row():