Bush flag in scripting?

I need to know where in the default scripts it controls the bush flags for tileset A2.
It's just I replaced one of the "tall grass" autotiles with a rounded pathway, and the bush effect happens (Where it tints the characters feet)

If I'm not mistaken, it is defined in the Game_Map script, though you might also want to look at the "bush_depth" variable in Game_Character. I can't really find in either of those things that define what is a bush and what is not though. Perhaps if you look for what accesses those things and what those things access.

Thanks for replying, and I can turn it off, but I found out I could just switch the pathway and my flower autotile. Now the flowers have a nice little colorful tint on the characters feet and the pathway looks normal now. Thanks again. Maybe someone else will put this info to good use!