@rtcxool, @deMEV made for you excellent tutorial how to change it, only one thing if you don't know how to work with textures read some additional guides:
To open UTX you need to decrypt/encrypt default Lineage 2 packages. So you need some editors, try this editor ( you can open original UTX
+ you saw in the video that the UTX in the end needs to be encrypted back, but it does not indicate which program it is.
You can use two:
1. l2encdec ( here )
2. mxencdec ( click ) You can use this.
Be careful, without encryption at the end you may have an error. Try. :)
If your question is resolved I can lock the topic.