refine prompt

app.py

@@ -75,7 +75,7 @@ def generate_description_fn(
                     {
                         "type": "text",
                         "text": """
-                            I want you to imagine how the technical flat sketch of the garment you see in the picture would look like, both front and back descriptions are mandatory, and describe it to me in rich details, in one paragraph. Don't add any additional comment.
+                            I want you to imagine how the black and white technical flat sketch of the garment you see in the picture would look like, and describe that flat sketch to me in rich details, both front and back descriptions are mandatory. The description of the flat sketch should be one paragraph long and you don't have to add any additional comment.
 
                             The style of the result should look somewhat like the following example:
                             The technical flat sketch of the dress would depict a midi-length, off-the-shoulder design with a smocked bodice and short puff sleeves that have elasticized cuffs. The elastic neckline sits straight across the chest and back, ensuring a secure fit. The bodice transitions into a flowy, tiered skirt with three evenly spaced gathered panels, creating soft volume. The back view mirrors the front, maintaining the smocked fit and tiered skirt without visible closures, suggesting a pullover style. Elasticized areas would be marked with textured lines, while the gathers and drape would be indicated through subtle curved strokes, ensuring clarity in construction details.