Hue-Shifting Battleback (XP)

[Tjmcnee]

Hello, I'm trying to create a hue-shifting battleback to create a battleback similar to Earthbound battlebacks, but I've ran into trouble. I cannot find code for hue-shifting an image anywhere in RPG Maker XP's scripts. I'm unable to find any methods for hue-shifting for sprites and planes (my battleback is a plane instead of a sprite) and the tone method is the closest I can get to it. May I please have some help with hue-shifting battlebacks? (I apologise for anything vague, I was in a rush while writing this.)

 

[orochi2k]

That background maybe a sprite.
But, there is likely a bitmap of it which you can do the hue change.

So, it's likely going to be....
@battleback_sprite.bitmap.hue_change(123) #the number 123 is just here for example
More details about hue_change can be found in RMXP's F1 help file.