Tried printing the frog from this set at 75% scale, and it came out like this. The original 3mf for this one doesn’t include supports. What should I adjust on my printer to get better overhangs without supports?

Tried printing the frog from this set at 75% scale, and it came out like this. The original 3mf for this one doesn’t include supports. What should I adjust on my printer to get better overhangs without supports?

On my printer I added an external 15cm pipe fan that blasts at the print. I only turn it on on prints that need it, but then cooling and overhangs are perfect.