Revert the prompt change.

Author: eleurent

backend/nature_go/generation/prompts/illustration_prompt.py

@@ -2,5 +2,5 @@
 prompt_v2 = "illustration of a {common_name} ({scientific_name}), 19th century, Journal of the London Society of {field_name}"
 prompt_v3 = """A vintage 19th-century scientific {field_name} illustration of a {common_name} ({scientific_name}), in the style of a hand-colored lithograph. The artwork features vibrant, saturated colors and exceptionally fine, detailed linework.
 
-The {type} is the central focus of the composition, shown in a clear, descriptive pose. The background is simple and sparse, with softly rendered natural elements to suggest the habitat. The entire illustration is presented on a uniform background with color #f8dfaf.
+The {type} is the central focus of the composition, shown in a clear, descriptive pose. The background is simple and sparse, with softly rendered natural elements to suggest the habitat. The entire illustration is presented on a uniform transparent background.
 """