diff --git a/assets/images/zivali/cow_brown.png b/assets/images/zivali/cow_brown.png
deleted file mode 100644
index ae32108fb..000000000
Binary files a/assets/images/zivali/cow_brown.png and /dev/null differ
diff --git a/assets/images/zivali/cow_highland.png b/assets/images/zivali/cow_highland.png
deleted file mode 100644
index b09670033..000000000
Binary files a/assets/images/zivali/cow_highland.png and /dev/null differ
diff --git a/assets/images/zivali/cow_normal.png b/assets/images/zivali/cow_normal.png
deleted file mode 100644
index d358eb798..000000000
Binary files a/assets/images/zivali/cow_normal.png and /dev/null differ
diff --git a/scripts/generate_full_overnight.py b/scripts/generate_full_overnight.py
index 2b9e0c5d7..d1ce2b803 100755
--- a/scripts/generate_full_overnight.py
+++ b/scripts/generate_full_overnight.py
@@ -28,8 +28,13 @@ OUTPUT_DIR = Path("/Users/davidkotnik/repos/novafarma/assets/images")
 REPO_DIR = Path("/Users/davidkotnik/repos/novafarma")
 PROGRESS_LOG = REPO_DIR / "generation_progress.log"
 
-STYLE = "2D indie game sprite, cartoon vector style, clean smooth outlines, full body visible, isolated on pure white background"
-NEGATIVE = "pixel art, pixelated, 3d render, realistic photo, anime, blurry, watermark, text, green background"
+STYLE = """Clean cartoon vector game sprite, bold smooth outlines, flat vibrant colors, 
+minimal shading, cute playful aesthetic, full body visible head-to-toe, 
+isolated on pure white background, 2D game art similar to Don't Starve or Zelda Link's Awakening style"""
+
+NEGATIVE = """pixel art, pixelated, voxel, 3d render, realistic, photorealistic, 
+detailed shading, gradient heavy, anime style, manga, blurry, low quality, 
+watermark, text, green background, Stardew Valley style, farm sim generic style"""
 
 def log(msg):
     ts = datetime.now().strftime("%H:%M:%S")