Haha, what the heck. Thanks to the Super Mario 64 code disassembly it's been discovered that the smoke Mario emits when he's touched fire has been bugged for 20 years. On the left: how it looks in the final game. On the right: after a one-line code fix.
Looks so much better with the fix applied. Quite hilarious it's been bugged for 20 years, but also shows how important it was for developers to get it right in the first go around, no DLC and or day one patches back then!